Story: Ticklish Divas Sleepover

Little shoutout to for reminding me that I didn't do anything with Miku for quite some time :3
Anyway, long story ahead

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Hatsune Miku was just coming back home from a short trip to the nearest konbini. The door to her spacious apartment was quickly unlocked and the actual preparations for tonight's sleepover could finally begin. After kicking her shoes off at the entrance, her socked feet would carry her over to the kitchen to unload all the snacks for her two guests. Glancing over at the clock, Miku couldn't help but smile: "It's just past 4 o'clock, Gumi and Luka shouldn't be here for another 3 hours~", she thought to herself before getting a bath ready.

Fully relaxed and still with a lot of time on her hands, Miku dressed in a black tank-top and some comfy sweatpants after her bath. She went on to prepare everything for the big night with her friends and easily got everything ready in time. From drinks and snacks to movies and games, all was prepared for her guests' arrival.

Right on time at 7 o'clock, Gumi was the first person to ring at her doorstep. Excited for their fun night to begin, Miku rushed over on her bare feet to let her friend in as soon as possible. "Welcome! Come on in.", she greeted her fellow performer with a big smile and pulled Gumi not just into the house, but also into a big hug as well.
"Hehe, I see someone's already very excited for today.", Gumi replied giggling as she hugged her friend back. "And I'm just as happy as you~", she added brightly smiling after breaking their hug so that she could get her shoes off.

Miku closed the door again while enthusiastically explaining: "Alright, so you can change either in the bathroom or in my bedroom anytime now. I guess we'll just wait for Luka and then decide what exactly we wanna do tonight!". Gumi had quickly changed into some shorts and a simple T-shirt for the night. Both girls sat down on the couch for some chatter, their bare feet propped up on the table in front of them and showing off the bright teal and bright green nail polish respectively that way. Luckily for the two of them, it took Luka just 10 more minutes to arrive, completing the party for tonight.

Luka was welcomed at the door by both of her friends, who were standing there widely grinning and already in their sleepwear. The cute looks of Gumi and Miku made her blush a little upon their sight. Smiling at the whole situation, Luka asked her friends while taking her shoes off: "I'm really happy to be with you girls, but aren't we all a little too old for a sleepover? Well, especially me I guess, hehe~".
"Aww, don't be like that, it will be fun, alright?", Gumi immediately replied and had Miku joining in as well: "Yeah, don't be silly. No one is too old for having some fun!".
"Well, guess I can't deny two such excited cuties like you that fun.", Luka replied sheepishly smiling before she went to get dressed for the night as well.

Soon the three of them were finally united on the couch. Luka had changed into a light pink pajama now, but unlike her friends was still wearing some white ankle socks with it. "Let's see, so what shall we do tonight? I've gotten as much stuff as possible ready for us~", Miku explained happily, not really having thought of a favourite activity of her own.

"How about we start with...", Luka was just suggesting as it burst out of Gumi: "Truth or dare! And with bottle spinning as well!". Blushing a little as she noticed how excited she got, Gumi added a little embarrassed: "I-I mean, it wouldn't quite feel like a sleepover without that, eh?". Giggling a bit at the sudden suggestion, Miku quickly nodded in agreement though: "She's got a point, I like that idea as well~".
"Sure, why not.", Luka shortly confirmed as well, still smiling from seeing Gumi's reddened face.

"I-I'm glad to hear it, let's get going then~", Gumi said nervously smiling, her blush slowly fading away now that her friends had happily agreed to her idea.
"I'll get a bottle, then we figure the exact rules out.", Miku exclaimed with glee as she jumped up to quickly get a bottle for them. As she came back, all 3 of them sat down on the floor in a triangle.

After some discussion about their rules, Luka summarized them again: "Alright, rules set then? We take turns spinning, the person spinning the bottle is in charge of thinking up a question or dare for the chosen girl and once you spin yourself, you get punished by having to do whatever the other 2 come up with. If that's a question or a dare is also in their hands then. And to ensure that everyone's doing their tasks, refusing to do something is punished with losing one piece of clothing, where only being nude is the limit... everybody agreeing to that~?", she asked smirking, by now being all fired up for the game herself. Miku und Gumi grinned at each other, then nodded at Luka. "Let's go, feel free to start Luka!", Gumi shouted happily, seemingly really excited to get her friends into some embarrassing situations.

The pink haired girl didn't waste any more time and spun the bottle. A few seconds later, Gumi was the first to be chosen: "Hmm, let's go with truth.", she said friendly smiling.
"Well, since you seemed so excited about this... what was the worst thing you had to do when you last played this game?", Luka asked smirking, curious to hear how mean it could get tonight.
"W-Well, I had to strip down to my underwear and give someone else a ride on my back.", Gumi answered blushing a little.
Widely grinning, Luka replied: "That's all? I'm sure we can find some more evil things to do~".
"I had no idea you'd be so much into this, hehe~", Miku exclaimed giggling. Though not showing it, she was also getting a little worried about how far Luka would actually go with them. "Anyway, my turn!", Miku added happily as she gave the bottle another spin.

This time it landed on Luka. "Let's make it a little more interesting than Gumi. Gonna choose dare of course~", she said grinning more, hoping it wouldn't be too bad of course.
Miku thought about her dare for a while, then suddenly had a big smile as she suggested: "If that really is so easy, then you strip down to your underwear now to give me a ride!".
"I like your way of thinking, no problem at all.", Luka replied smiling and was already stepping out of her pajama. Remaining only in white underwear and her socks, Luka went on all fours and nodded at Miku: "Come on, you get one lap around Gumi." As she sat down on her friend's back, it was actually Miku who felt a little silly now. And seeing just how easily Luka went with it all, her worries for far worse dares later on were being fueled even further. Luka then completed her lap under a few giggles and comments from her friends. As she put her pajama back on, she was really determined now to play a little meaner with her friends tonight.

"My turn then~", Gumi exclaimed gleefully as she spun the bottle next, which once more chose Luka as the candidate.
"Truth this time, let's see what you can come up with.", Luka said and expected nothing too personal from Gumi's question.
"How about... Why are you still keeping your socks on? We're all barefoot anyway~", Gumi asked giggling as she shortly pushed Miku's bare foot with her own to emphasize the fact that they both we're missing their socks already.
A bit surprised by it, Luka just smirked before answering: "That's seriously all you can come up with? Looks like it's gonna be my easiest game of truth or dare ever.", she said and poked her tongue out at her friends. "Anyway, no reason at all. I can take them off if you want me to?", she added with a questioning tone.
"I don't care, do what you like~", Miku replied smiling. Gumi had another opinion though: "Do it, it's more comfy that way~", she explained with a sweet smile across her face as well.
"Fine, then I'll take them off.", Luka replied as she tossed her ankle socks away and wiggled her toes on the ground. Just as expected, she had her nails painted in a bright pink.
"See, your toes are much happier that way, hehe~", Gumi added cutely giggling as she shortly watched her friend's toes.

"My turn again, let's show you how this game is played properly!", Luka said in a little threatening way, hoping to induce some fear into her friends like that. Now it hit Miku for the first time. Indeed being scared a little of what Luka might request for a dare, the teal haired singer went for truth instead.
"Scared, huh? No problem, I can come up with clever questions as well~", Luka announced triumphantly, her tactic of scaring the other girls off with pure confidence working great so far. "Oooh, I know something... Mikuuuu~? If I remember correctly, you're really, really ticklish. How about you list your top 3 most ticklish spots in order for us?", Luka asked with an evil grin.
Miku's eyes widened in surprise and fear, immediately realizing where this was going: "Oh, no! No, no, no, that's evil! I know what you're up to next!", she squealed and pointed at Luka, the rest of her body having curled up a little in protection already.
"So you rather wanna strip off something instead of answering such a simple question?", Luka replied and was still widely grinning. Gumi as well couldn't hide a huge grin anymore, eagerly awaiting an answer as well.
"F-Fine! Feet, armpits, back of my knees! Hope you are happy...", Miku answered a little hysterical, then hid her bright red face in her arms.
"I'm happy indeed, good job Miku~", Luka said smirking over to Gumi. "Don't worry Miku, we're just playing a little game after all.", Gumi tried to calm her friend down again. "By the way, it's your turn again, just vent it on one of us, hehe~" she added cutely giggling, so far having had great fun with her truth or dare suggestion.

"Don't even think about tickling me, or you'll both get horrible revenge for it!", Miku cutely complained, her face still covered in a slight blush as she spun the bottle another time. "We'd never do... oh~", Luka replied calmly, the bottle landing once more on Miku as she was speaking. "Oh god, no!", Miku squealed as she saw it, her whole body curling up in defense again.
"I'm guessing we have the same idea?", Gumi asked giggling as she looked over to Luka. "Absolutely. Come on Miku, we want your feet for a few minutes of tickling~", she replied happily smiling herself.
"You both know how ticklish I am, that's too much...", Miku complained again as she was imagining having her bare feet tickled by her friends.
"Don't be such a baby. Also, there will be plenty of chances for you to have us do even worse things, remember that~", Luka tried talking her nervous friend into submitting her feet to them.
"I'll make you both pay so much for this.", Miku said in a low voice as she slowly extended one foot each to Luka and Gumi.

"Hear that? We better give her a really awful tickling, so that she can't take revenge on us anymore~", Luka said with an evil grin, Miku's right foot already hooked up firmly by her.
"Are you sure? I'm a little afraid of her revenge to be honest.", Gumi replied truthfully, a blush spreading across her face as she took the cute little squirming foot hostage as well.
"J-Just get over with it already...", Miku whispered sounding quite a bit annoyed, her toes all curled up while she was already pulling a bit on her legs.

"Aww, please don't be so grumpy, I wanted us all to have fun with this game~", Gumi said warmly smiling at Miku, her own fingertips being the first to teasingly draw some circles around the outlines of her friend's foot.
"B-But why tickling?", Miku asked under some first little giggles. Surprisingly to her, the current teasing actually wasn't feeling too bad on her soles.
"Because we wanna see you laugh and that's the easiest way to do it?", Luka answered in a question herself, her evil grin widening as she used a single nail of hers to drag it painfully slow along the baseline of Miku's toes.
"S-Stop! Luka!!", Miku shrieked immediately a she felt the new sensation, her foot trying hard to jerk away from the evil tease. Sadly to her, Luka's grip was just too strong to actually get away from the dreaded sharp claw.
Not to be outdone, Gumi couldn't hide her amusement over the whole situation and under some giggles of her own, began scribbling her fingertips randomly all over her friend's sole. Doing so sent Miku into real laughter quite fast. Her complaining quickly shifted over to Gumi again, as her body was shaking around to distract herself from all the tickles.
"Ah, good to see you're having so much fun in the end, Miku~", Luka teased a little more, instead of following Gumi's explosive lead though, she kept to a methodical slow pace, analyzing the teal haired girl's most sensitive spots very thoroughly.

"Gumi, please! I beg you!", Miku was cutely whining, her constantly wiggling and quivering sole making her young friend just all the more happy to keep tickling it though. The foot Luka was appointed to wasn't even on Miku's mind anymore, as the ticklish feelings this one received seemed rather harmless to her in comparison, except for the sudden spiking shrieks due to Luka finding an especially sensitive spot again with her nail every now and then. After around 3 minutes, Gumi slowed her tickling pace down and was just lazily dragging her fingertips over ball and arch some more: "I think that's enough for poor Miku~", she said with an ever happy smile, hoping that Miku didn't hate her too much after the mean tickling. "Hmm? Already?", Luka asked a bit startled, her single nail still trying to get some squeals out of tickling Miku's highly ticklish arch before she stopped with a little smile as well. "You got lucky, but now I know all of your feet's weakspots~", Luka exclaimed grinning over to Miku.

"Geez, you girls are both horrible in your own way!", Miku shouted poking her tongue out at them, her last few giggles escaping as well. She pulled hard on her legs to get them free now, rubbing her tortured soles a little to get rid of the remaining ticklish sensations in them afterwards. While she'd never admit it, the smile across her face was easily telling though that it wasn't quite as bad as her pleading made it out to be.
"You both are so dead! I know for certain that both of you have more than ticklish feet as well!", she announced widely grinning. Gumi and Luka both seemed relieved to hear that Miku apparently was alright with the tickling after all, though especially Gumi had her own little feet trembling in fear now just at the thought of Miku tickling her back.

Though a bit nervous to roll herself, just like Miku did, Gumi proceeded with the next bottle spin anyway. "Yes~", she happily exclaimed, the chosen girl being Luka again.
"Guess I better take truth for now.", the pink haired girl said friendly smiling, knowing perfectly well that she was gonna get it now sooner or later as well though.
"I'll get you two, don't worry~", Miku threatened playfully, her fingers wiggling in the air at both Gumi and Luka.
"Alright, of course we want your most ticklish spots now!", Gumi said excitedly to Luka and then gave Miku a wink.
"Can't say I wasn't excpecting this... feet, ribs, belly~", Luka answered without any complaints, once more playing the most confident of the group.
She quickly picked up the bottle to get to the next round, Miku and Gumi giggling happily at the new information still.

As the bottle landed on Gumi, Luka already cut her off the second that the bottle stoppped spinning: "Just say them, we all know your choice and my question then, hehe~".
"Y-Yeah, I guess... feet as well, then thighs and sides.", the green haired girl answered blushing a bit, her toes once again twitching in fear of her friends actually tickling mentioned spots now.
"Knew it, you are just as helplessly ticklish on your feet as me!", Miku exclaimed grinning, apparently having forgotten that she could get tickled herself again any minute though.

"Can't we change the rules a little? I wanna tickle you girls back, but know that none of you is stupid enough to go for a dare anymore...", Miku asked a little disappointed as she picked the bottle up again, slowly realizing that she could indeed doom herself again now. "Only tickles for whoever gets elected now? That's a little weird, isn't it?", Luka asked back with a friendly smile, not quite sure herself if that would turn out good for her.
"What? Oh no, let's not change it! We have agreed to our rules before, no changing now.", Gumi spilled her opinion as well, an all out tickling war sounding like a really bad idea to her, considering how ticklish she was.

"Hmm, ok...", Miku replied frowning a little as she gave the bottle it's next spin. Once again Luka was the chosen one. Looking at her with puppy eyes, Miku asked acting all cute: "Luuuka~? Please let me get some revenge, that's just fair after all~". Not able to resist that look, Luka took a deep breath and then replied smiling: "Fine, I want a dare~".
"Hehehe, that was too easy. I can tickle the crap out of you as soon as you spin yourself, but right now I'd rather humiliate you for being so mean!", Miku exclaimed with an evil grin.
Actually caught off guard by it, Luka blushed a little at how easily she fell for her friend's cute act. "Not bad at all, what's my dare?", she asked curiously, hoping Miku wouldn't be too evil on her.

Extending both her feet directly to Luka's face, Miku explained giggling: "You'll give my feet 5 kisses each, maybe they can forgive you again then!". Despite the huge itch to just tickle torture her friend for revenge, the embarassing act of having her soles kissed sounded like a nice punishment as well to her.
"Ugh... fine.", Luka replied a little hesitant a she grabbed Miku's ankles, shortly after delivering 10 kisses to both of her friend's soles. "You two look really cute like this~", Gumi commented from the side as it was happening, suddenly imagining herself at Miku's soft soles which let her face just get bright red once more from her thoughts.
"I'm sorry, but it wasn't quite as bad as you hoped for~", Luka said gently smiling as she put Miku's feet back down. "Too bad, felt nice anyway~", Miku replied brightly smiling herself as she pulled her legs close again, ready to have Gumi go on with the game. Taking a deep breath to calm down, Gumi then started another round. "This can't be good...", she whispered to herself, at last having rolled herself as well now.
"Tickles!!", Miku squealed in excitement as she saw it, really eager to get her revenge on Gumi. Luka as well slightly giggled and nodded, of course agreeing to her friend's idea of tickling yet another poor girl tonight.

"How about you lie down on your belly? I'll kneel down right over her ankles, to keep the feet from moving, while you will tickle them.", Luka suggested grinning over to Gumi, then turned around to Miku as she offered her previous victim Gumi's bare feet all to herself. "Deal!", Miku immediately confirmed with great enthusiasm. "Come on, get on your belly now~", she said teasingly while slowly crawling over to her prey.
"You'd just overpower me anyway, guess I'm better off this way...", Gumi replied being quite nervous as she was already turning around to lie down on her stomach.
"And I'm gonna see if she wasn't lying about her thighs being ticklish~", Luka joined in again as well as she got into position, her own weight carefully, yet very effectively trapping Gumi's ankles underneath her.

"P-Please have mercy.", Gumi cutely begged, her eyes closed and her whole body already tensed up as she was waiting for her friend's inevitable strike.
"Now feel how mean that really was of you!", Miku exclaimed evilly grinning to herself. Moments later, her sharp nails hit Gumi's soles, tickling all over them, though mostly focusing on the delicate arches.
"Sorry, don't wanna miss my chance this time around~", Luka said smirking while quickly joining in on the the tickling, ditching her slow investigative tickles for furious nail swipes all along her friend's unprotected thighs.

"YAAAAH!! Please stop!!", Gumi squealed almost immediately. Wiggling from side to side was only of little relieve to her as Luka's weight was holding her extremely sensitive soles still locked in place. Reaching behind her back, she gave it her best to at least slap Luka's hands away from her thighs, doing so with nearly no results as well though. While their friend was still filling the room with her sweet laughter, Luka commented giggling: "Hey, stop that. I'm faster than your silly attempts to interfere~", her hands indeed being a lot faster and more precise than anything Gumi could hope to stop in her current state.
Miku meanwhile found great joy in watching her friend's bare soles flap violently on the floor. The cute toes wiggling around like crazy and the small wrinkles appearing in ever slightly changing patterns on the soft soles really pumped her up to just keep torturing those cute soles on and on. Not to mention the sound of Gumi's hysterical laughter, which of course was easily satisfying Miku's wish for revenge as well.

Poor Gumi had already been tickled for 4 minutes when Miku decided that it was enough for a little revenge, as she didn't want to be that evil herself. Just as she was slowing down her fingers' movements, Miku noticed the cute pair of feet that was sitting right next to those still being tickled though. A smirk formed on her face as she quickly switched over to give Luka's bare soles a little tickling now as well: "Revenge!", she shouted happily as her nails dug down into the next pair of sensitive feet. Greatly surprised by it, Luka shrieked and jumped away from her friend's awfully sharp nails in an instant. Feeling that the weight was gone, Gumi quickly pulled her legs up and rolled away from both of her friends as well, still laughing from the remaining ticklish feelings while doing so.

"Miku!", Luka barked angrily, her face covered in a slight blush from having had her ticklishness exposed like that.
"Hmm? Come on now, that wasn't even a second~", Miku replied playing all innocent, her face easily telling that she was having a hard time supressing a huge grin though.
"You know it was Gumi to be tickled, not me...", Luka explained still glaring over to Miku, not noticing that a certain green haired friend of hers was already sneaking up on her again.
"I, uhm... I'm really sorry!", Miku suddenly broke out in tears as she crawled over to Luka, hugging her tightly.
"Wh-Wh-What?! No, please don't cry, I forgive you Miku!", Luka immediately tried to calm her friend down, very surprised by how emotional she got all of a sudden though.

"Got you~", Miku whispered into her friend's ear, the hug tightening fast to an iron grip that wouldn't let their latest victim get away so quickly this time. Before Luka fully realized what was going on, Gumi had already put her green nails to work on the smooth and defenseless soles at her mercy. "NO, S-STOP!!", Luka squealed cutely in response to the overwhelming ticklish feelings, following that up with lots of sweet laughter as well. While she could manage to shake Miku around a bit and also not get her feet completely pinned down by Gumi, that was only helping very little in dealing with the 10 fierce nails skittering all across her sensitive soles and toes.
"Don't be so noisy, I'm gonna get deaf at this rate~", Miku teased giggling, Luka's screams and laughs right next to her actually being a wonderful reward to her. She hold on tight to her pink haired friend, who was still laughing like crazy from several minutes of merciless foot tickling. After roughly 7 minutes had passed, Gumi finally had mercy on her friend and switched the torturous tickles out for playful pats on the cute soles instead.

"That's what you get for being so mean!", Miku exclaimed poking her tongue out at Luka, her hug still very tight though as she was fearing immediate revenge. Luka meanwhile was panting heavily, her head resting on Miku's shoulder and her face covered in a slight blush as well. "Be sure that I'll make you pay for this someday... both of you~", Luka replied weakly smiling, still recovering from the previous ordeal. Gumi soon crawled up to her friends, giving both of them a little hug on her own: "Well, I had quite some fun, what shall we do next~?", she asked happily.

"Hmm, we're doing something else now?", Miku asked giggling and finally let go of Luka again.
"Oh, so you want us to tickle you more? We can arrange that!", Luka replied grinning and had Gumi backing her up: "Yeah, no problem at all, Miku~", she added brightly smiling, already reaching for the ticklish teal haired singer again. "Hehe, wait. That's not what I meant. I just wanna tickle you girls some more of course~", Miku exclaimed smiling as well.

"So everyone had fun with tickling? Wanna experiment a little more with that now~?", Luka asked a little mysteriously, though her face was going bright red in an instant from the suggestion, blowing her tough act like that.
"W-What are you planning?", Miku and Gumi asked in unison, both intrigued, yet a little scared by Luka's words.
"We'll spin the bottle once more and... decide on the test subject for tonight that way~", Luka explained winking, starting more and more to enjoy the thought of having one of her cute friends at her mercy for the rest of the night.

"That sounds like way too much for me...", Miku replied blushing a little as well, her toes nervously wiggling against the floor as she thought about it some more.
"Y-Yeah, I couldn't take that either...", Gumi replied quite nervously. Looking Luka deep into her eyes, she tried to see if her friend really wasn't joking with that idea.
"You see, I guess we can all agree that we had fun tickling one another? And since none of us is willing to submit herself for some more fun, we'll just choose the lucky girl another way~", Luka exclaimed friendly smiling, hoping to be able to convince her friends in the end.

"True I guess..." Miku whispered a little embarrassed, not able to deny how much fun she had just now. Gumi let out a deep sigh before asking: "So, any rules?", a huge grin across her face as she was seemingly sold on the idea after thinking it over again. "I'd say we just tie our lucky winner up and negotiate the details from there, hehe~", Luka replied grinning back.
"That sounds really horrible, promise me at least to have plenty of breaks in case that it hits me...", Miku said cutely pondering, all in all ready to take the risk as well though.
"Yeah of course, don't worry!", Gumi shouted happily, Luka just adding an agreeing nod to it. "S-Shall I do it then?", Miku asked nervously as she picked up the bottle again. With Gumi and Luka both encouraging her, she gave the bottle another spin.


"Just lovely~", Luka exclaimed gleefully as she saw the result.
"I'm really sorry, but I'm sure you'll have fun as well~", Gumi added grinning widely.
Miku however was speechless, frozen in place from the thought of her friends torturing her all night long.

"Aww, she's too cute being scared like this. Anyway, I guess your bed would be good place for what is coming now!", Luka announced full of joy. She then quickly got up to drag their victim over to said bedroom.
"C-Come on, you can't be serious about this?!", Miku complained, still not fully believing what was going on, though not putting up too much of a fight either. "But of course we are serious, I'm sure that we will all have a blast tickling you some more~", Gumi replied friendly smiling.

Arriving in Miku's bedroom, the teal haired singer was gently pushed onto the big, cozy bed by both of her friends. "You'll stay here and get ready while we get everything else~", Luka instructed winking. Her and Gumi quickly rushed out the room, locking it up though just to be sure that Miku wouldn't try to run now.
"That little tickling from before was fine, but they'll surely kill me with this...", Miku thought to herself, her body curled up on her own bed. In the meantime, Luka and Gumi searched all of their friend's apartment for useful and interesting things to try out on their ticklish victim. After all they were supposed to be experimenting a little tonight.

Armed with ropes, brushes and many more things, Gumi and Luka came back again after some minutes. "Aww, I said get ready. Why didn't put on one of your lovely bikinis for us?", Luka asked sounding a little disappointed.
"Yeah, put on that polka dot one!", Gumi demanded giggling. She dumped all that she was carrying on the floor and rushed over to her friend's closet, soon holding the desired bikini in her hands.
"B-But I already have so little protection...", Miku argued in defeat, still all curled up and knowing exactly that she didn't have much say in that anyway.

"Nah, that tank top is still way too much clothing. You have 30 seconds to change, then we'll come in again, no matter how far you've come~", Luka explained grinning. She dropped her supplies as well before she went to leave the room again. Gumi quickly tossed the bikini over to Miku, then followed Luka out. While really not wanting to submit herself in nothing but a bikini, Miku even less wanted her friend's to see her fully nude, so she quickly changed clothes after her friends had left. Taking a quick look at all the things her friends brought in, Miku sat back down on her bed, deeply blushing at the thought of what was awaiting her. Kinda curious, quite afraid and a little embarrassed to be tied up and tickled, she took a few deep breaths before Luka and Gumi both rushed back in moments later.

"Way cuter~", Gumi commented happily as she spotted the new outfit on her friend.
"Let's tie her up and then discuss some rules for the night with our test subject.", Luka exclaimed with a slight blush, Miku's looks clearly being too cute to handle for her.
"Y-You'll only have a little bit of fun, right? You can't really torture a good friend of yours, right girls!?", Miku asked getting more and more nervous again.
"Who knows, we'll see once you can't run anymore~", Gumi replied grinning as she approached her friend with some ropes. "Lay down and arms up!", she commanded and was already pulling on Miku's arms to get her in place. "No need to be so rough on her, hehe~", Luka said giggling as she watched the scene for a second. While Miku was still lightly struggling against Gumi's attempts to tie her up, Luka took the moment to secure her friend's feet by herself now. As Miku did only put up a little fight, it didn't take that long for the girls to fully restrain their friend. In the end, Miku had her arms and legs spread between all four bedposts, luckily for her with a little bit of room for squirming though.

Happy with their work, Gumi and Luka both sat down at Miku's exposed sides. Despite only running a few fingertips each gently along the sensitive sides and ribs, the teasing touches made Miku giggle and wiggle around quite a bit already. "Alright, tell us what rules you'd like to set up for this and let us discuss everything that we don't like about your suggestions~", Luka explained winking. "Yeah, get going! We won't stop for that of course~", Gumi added grinning, both the girl's teasing indeed not stopping.

"B-Breaks! I w-want many breaks, hehehe!!", Miku shouted giggling. Though it wasn't tickling too bad yet, she feared way worse tingling still to come tonight.
"Hmm, I'd say you get breaks whenever we feel like you need one, your opinion?", Luka asked over to Gumi, who just nodded in confirmation.
"No, not okay! Hehe~ I'll n-n-need more than you'd grant me!!", Miku cutely complained as she was still trying to evade her friend's playful fingertips by moving her upperbody around.
"The vote is 2 to 1, we make the rules here~", Luka replied grinning back and started using her sharp nails instead now. Doing so earned her a surprised squeal and even more giggling from Miku.

"Anything else you'd like to bargain for or can we start now~?", Gumi asked full of joy, soon getting a little meaner as well by also switching over to her fingernails for the ongoing tease.
"Tickle anything but my feet, I beg you!", Miku squealed under more and more giggling, hoping for the wonder of her friends actually agreeing to that proposition.
"Let's see, really ticklish, super cute, all tied up and on display for us already... denied my dear~", Luka replied with a bit of sadistic glee, her nails slowly wandering up to lightly tease Miku's highly vulnerable armpits a little.
"P-Please no, leave my feet alone!!", Miku screamed in fear, before the tickling on her armpits broke her. She lost her last bit of control rather quickly and was violently tugging on her restraints while laughing from having one of her most ticklish spots explored by some curious nails.

"Hehe, I think we should also blindfold her.", Gumi suggested to Luka and stopped her teasing for now, completely ignoring Miku's pleas all the while.
"Good idea, we wanna see some true reactions, can't let her know what's coming before~", Luka replied smiling over and also stopped with her mean tease.
Though happy to be able to calm down a little, it burst out of Miku in terror: "What? No, please girls, that's way too much torture for me, please!!", she begged desperately and once more tried her best to break free from her ties. Despite wearing herself down, that wasn't getting her anyway though.

While Gumi searched for a fitting blindfold, Luka was gently patting Miku's belly as she explained in a sweet tone: "You should better relax right now, it's your last break before the real fun starts, hehe~".
"I... I won't be able to take this...", Miku replied with a low voice. She did follow her friend's advice though, stopping her breakout attempts to recover a little more.
Blushing a little, Luka leaned in close to whisper into Miku's ear: "Don't worry, all will be fine. We'll have to make you go a little crazy, sure... but it won't ever be too much, promise~ Is that ok?".
"Fine, I'll trust you...", Miku whispered back, then suddenly shouted: "Hey, I do want one promise right now! We'll do this again with someone who is not me tied up, can I get at least that?", she asked with a cute little smile forming on her face. Seeing it made Luka really happy and all the more eager to get her friend tickled good now.

"Well, it's just fair I suppose...", Gumi replied a little nervously as she came back with her blindfold, the thought of being in Miku's position right now being quite exciting yet absolutely horrifying to her.
"Yeah, let's give you that at least~", Luka replied happily and stepped back a little, so that Gumi could put the blindfold into place. After a little bit of fiddling around with it, Miku was completely blinded.
"Great... And please be nice, I'm way too ticklish for this and you know that!", she exclaimed blushing a little as her body was nervously moving around, not having any idea where her friends would start the hellish punishment. Without saying any words, Luka and Gumi made up their attack plans by nothing but gestures. The girls got their tools ready and sat down in place. Gumi was kneeling right on Miku's pelvis, her friend's stomach fully exposed in front of her, while Luka sat down a little higher up, right beside their victim, her target being the singer's ticklish armpits it seemed.

"I t-t-take i-it all back! L-Let me out, I r-really can't d-do this...", Miku stuttered in great fear, the weight on her body making her feel even more trapped and helpless than before. "Forget it test subject 39, we have many tests to run on you tonight~", Gumi replied playfully and began with her tickling right away. She had picked out two long, stiff, red feathers as her first weapons and was dragging their tips in fast, teasing circles all around Miku's belly. Doing so proved once more how sensitive the poor victim was. Despite trying to hold it in, Miku didn't hold out longer than half a minute before her giggling started to fill the room again.

Luka was only watching so far, enjoying the cute giggles her friend was producing. But as soon as Gumi lost her patience and started digging around in Miku's belly with one of her feathers, Luka couldn't wait any longer either and began to put her paintbrushes to use on the two fully exposed and very ticklish armpits at her mercy. While both girls kept to a rather teasing pace, especially the paintbrushes were driving Miku mad already though. She was shaking her body around, her movement being quite limited though. While having lots of her sweet laughter pour out of her mouth alongside it, Miku could do nothing but live through the tickling as she realized that there really wasn't any way out of her predicament.

"Stop! Please!!", she cried out after 5 minutes of the torment had passed already, her face covered in a little blush by now as well.
"Aww, but we barely started our experiment. This will go on a lot longer~", Gumi replied giggling to herself.
"Maybe we should punish test subject 39 for being so demanding?", Luka asked turning to Gumi with a big grin.
"NO!!", Miku squealed through her laughter as she heard it, but her friend's had already decided differently. While Gumi flipped her feathers around to use their quills, Luka went back to brushing their poor victim's sensitive armpits. Both of the girls added a lot more speed and pressure to their tickling though, forcing Miku into even greater trouble. Bucking hard against all her restraints, she screamed under ticklish terror for help whenever she actually got a chance for that, as the teal haired girl was mostly occupied with laughing her lungs out anyway.

Not wanting to be too brutal on their good friend, Luka and Gumi decided to give Miku a break after 5 more minutes of real torture. Heavily panting and still quivering from the awful tickling she had just received, Miku begged sounding a little out of breath: "Please girls, I'm too ticklish! Please let me go!". A bright blush accompanied by a cute little smile were tellling a different story though. Seeing just that, Luka leaned in close again, whispering: "See? Everything's alright, isn't it~?". Miku just silently nodded in response, the tickling having been horrible but indeed not unbearable to her.

Giving her a friendly kiss on the cheek, Luka came back up and turned to Gumi again: "So, what's the next test for our cute little specimen here?", she asked smiling over, her fingers teasingly walking up along Miku's bare arm while doing so. "I'm not sure, are we testing her feet yet?", Gumi replied grinning, obviously having a hard time to hold herself back from the main attraction any longer.
"No, I don't think that's a good idea. The extensive and extra long tests on her feet should come last I'd say, she might not make it through these alive after all~", Luka replied winking.
"Uhm alright, but what will we do next then?", Gumi asked a little disappointed, her fingers really itching to tickle their friend's cute little soles some more. Luka just smirked at the question and walked over to her friend. She whispered her plans into her partner's ear, who happily agreed in an instant.

"W-What's going? Please let me free already.", Miku asked a bit nervous again, not knowing when and how her friend's would strike again being not easy to cope for her it seemed.
"Listen up, new rules! We won't stop tickling until you ask us nicely to tickle your feet. So the longer you hold out now, the less time we will have to explore these ticklish soles of yours later~", Luka announced happily. After Gumi had crawled up a little, Luka sat down back to back with her tickle partner to face Miku's bare legs.

"B-But you'll tickle my feet regardless...", the cute victim replied under some more light wiggling beneath her friends.
"That's the point~", Gumi whispered sweetly giggling and once more had her sharp nails dive down into Miku's sensitive flesh, this time hitting the girl's ribs, which sent her into constant laughter right away once more. Not wanting to be left out, Luka as well put her nails to good use again, tickling all over her ticklish friend's kneecaps with them.

Despite struggling with all her might against it, Miku couldn't really move all that much while the continuing tickling had her laughing to no end. As if it wasn't bad enough for her already, Luka decided to switch targets after a few minutes and went for the back of her knees next. Miku's squeals and screams for mercy just increased even more in frequency because of that. With her eyes tearing up beneath the blindfold, the poor girl was close to giving in after having endured a total of 10 minutes of endless rib and knee tickles.

"TICKLE MY FEET!!", Miku suddenly screamed through her laughter, barely managing to do so under the hellish torture her friend's were dishing out. In an instant, both Luka and Gumi slowed down their tickles to a teasing pace again.
"Don't be so demanding, we wanna be asked out on that~", Luka said giggling.
"Yeah, that's not very kind of you number 39~", Gumi chimed in as she moved her nails up to tease the extremely ticklish armpits some more.

"I-I'm sorry! Would y-you please t-t-tickle my feet?", Miku managed to stutter along with her heavy giggling from the ongoing teasing. Having to ask for her own doom like that made her blush quite a lot again, much to Gumi's delight: "But of course... though you didn't last very long, so the tests on your feet will have to run a lot longer now!", the green haired girl announced grinning widely, shortly after hopping off the bed to prepare for the finale.

"We'll have to discuss this a bit~", Luka said happily smiling as she went over to the pile of tickling tools as well. "15 minutes each and extra tickles with whatever worked best?", she suggested grinning over to Gumi.
"Sounds good to me~", Gumi replied nodding back at her friend while picking out her first little helper, an electric toothbrush. Luka didn't need long to decide either, quickly arming herself with a huge hairbrush which had countless bristles to aid her tickling.

Miku, who meanwhile had been constantly begging her friends to spare her more tickling, was once again pulling hard on her legs to try and get her ticklish bare feet freed. "Please, you can't be so cruel, my feet are too ticklish!", she squealed in fear as she felt her friend's hands gently rubbing over her bare soles after they had returned. With Gumi and Luka both having sat down in front of one of the cute little feet, their mean experiments could start any moment. Just as Luka took up her brush, Gumi whispered with a bright red face: "I...I wanna try t-that as well...". She then went close to her friend's squirming bare sole, giving it a few kisses now as well.

"Please, please, plea... huh? Thank you so much!", the poor victim got positively surprised, some more soft kisses clearly being preferred by her over more torture.
"Hehe, indeed that's looking very cute from the side~ Please don't mind me starting already.", Luka commented smiling over before she began to brush away furiously at her friend's naked sole.

"Wha...? No, no , no, NO, NOHOHO!!!", Miku was very quickly reminded of the actual situation that she was in. Her sweet laughter was once more pouring out in great amounts while her whole body was shaking in the ties. Happy with her little test and too bothered by her friend's frantic movement to go on, Gumi ceased the kissing and instead went to torture her assigned foot as well now. As soon as her whirling toothbrush hit Miku's sensitive toes, the poor girl was completely losing her mind.

Despite really wanting to beg for mercy, the constant tickling made it impossible for Miku to form any sentences as nothing but screams and huge laughter was leaving her mouth at this point. Her friends even stopped their extreme tickling after just 10 minutes, fearing that they were going a little too rough on their cute test subject. Miku didn't notice that at all though, the torture felt like an eternity to her since the first minute anyway. The blindfold was visibly wet from some tears and also her naked soles were a little reddened from all the brushing they just had to endure.

"No more! Please stop!!", Miku squealed and still couldn't stop giggling after a short moment of recovery. Seeing that she really was reaching her limits, Luka and Gumi smiled at each other and decided to spare their friend for the night.
"Alright, I think you really had enough~", Luka announced giggling as her hands were gently caressing the foot in front of her.
"We want just one last bit of tickling and then you are done~", Gumi chimed in happily.
"I... I guess that's fine you meanies.", Miku replied poking her tongue out, clearly showing that her friends didn't overdo it.

"You better stay silent for these last few minutes or else we might change plans again!", Luka replied grinning and gave one of the most ticklish spots on her friend's sole a quick poke. "I-I-I understand!", Miku quickly replied. Since even that little poke was nearly breaking her again, she was certain that following Luka's command would be the best option for her.

"Now, let me show you what I found out earlier~", the pink haired girl said brightly smiling. With Gumi curiously watching, Luka very lightly teased the most ticklish spots one by one now to showcase them. Miku had a hard time keeping her cool throughout, eventually letting some giggles and squeals slip out during Luka's demonstration already as her feet twisted and turned in the bonds. Points of interest were 2 specific parts of the arches as well as one on the balls and another one between the second and third toe. Gumi couldn't wait to try these weakspots out herself and so she joined in rather quickly. Unlike the teasing Luka, she was going all out from the beginning again and had her sharp claws scratching mercilessly over her friend's worst tickle targets.

In turn Miku brought out some incredible screams, squeals and laughs again. With Luka quickly picking up her pace as well, it wasn't long before the teal haired girl was going crazy again. While her cute feet were violently shaking from side to side to try and evade some tickles, the rest of her body was just as much in action from the huge torment. Luckily for her, Gumi and Luka were kind enough to have some mercy on their poor victim. They only tickled for another 5 minutes before sitting back down on the bed to either side of their friend.

Miku's face was bright red from all the laughing and after the tickling had stopped she was still panting heavily to recover. That didn't stop her from begging to be freed though: "C-Come on girls... I had enough, let me free~". Just as Gumi was removing the blindfold, Luka had a huge grin forming on her face. Without even discussing it, she just announced her idea right away: "Well Miku, you didn't quite last as long as we were hoping for. To make up for that, I'd say we keep you tied up a little longer tonight, hehe~ Don't worry, it won't be so bad anymore.".

"What?! No please, you can't do that to me...", Miku replied cutely pouting. Gumi meanwhile was just as puzzled as her victim, not quite sure what Luka was doing at the moment.
"Don't worry, I promise this won't be nearly as bad as before, we just want some more time with such a cute test subject like you~", the pink haired girl responded warmly smiling. If it wasn't for her already bright red face, hearing that just now would have made Miku blush like crazy for sure.
"F-Fine, but promise to be nice to me from now on!", she replied smiling herself now.

So instead of freeing their tortured friend, Luka and Gumi just adjusted the ties a little. Soon Miku had her ankles and wrists each strapped together and was carried over to the sofa again. Cuddled up under a blanket, the trio watched a movie together. And with the tied up Miku sitting in the middle, a few friendly pokes and tickles and the resulting squeals and giggles every now and then made the evening just all the more enjoyable to everyone.