Chapter Text
Len sat on the bed, nervously glancing around, waiting for Miku. She said she had a surprise for him, though didn’t elaborate. Rin and Len had recently moved in to this computer, living here only about a month or so. Miku has been here little over two years now. Len waited quietly in Miku room, Rin fast asleep in her own room.
After what felt like eternity, Miku entered, a wicked smile on her face. As she shut the door, she leaned her back against it and locked the door.
“Glad to see you’re still awake, Len-Kun~” she sang.
Though they often sang together as a trio, this was the first time Len had been inside Mikus room. It suited her, he thought to himself. The walls painted a pale teal, an open closet with various dresses hung, and a large bed with pillows of all shapes and sizes. A few more objects here and there, mostly instruments and scattered music sheets. An organized chaos.
“Onee-San,” Len began, showing politeness, “what are we doing today?” As far as Len could tell, there were no video or board games. Not even a TV to watch movies.
Miku stepped away from the door, stopping right in front of Len, who nervously leaned back. “Len-Kun,” she started slow, “what do you know about “sex?””
Len looked anywhere but Miku, face and ears turning a bright shade of pink. “U-Um, well-! Th-the Producer had Rin and I sing a few songs together and that’s sort of it…”
”Is that really it?” Her voice was soft but something in her eyes…
Len nodded aggressively “r-right!”
Miku gave a small laugh. “Len-Ken you don’t have to lie. The truth is, you’re curious about Onee-San aren’t you?”
”e-eh?”
From under her skirt, Miku took off her panties, careful not to expose herself. “Len-Kun, I saw you spying on me the other day,” she held the panties up to Lens face, inches from his nose. They were plain white, but held her scent, slowly entering Lens system. “I was changing clothes, a new video for the producer,” she continued. “I forgot to close my door. And I saw a cute little boy staring at me.”
She dropped her panties on Lens lap, the boy too stunned to react.
“And then, after that, my favorite pair of panties went missing. A cute Lacey one with a ribbon. You know the one~”
Lens face went redder still. Hidden under his mattress was the contraband item. Though he kept himself quiet.
“Len-Kun,” Miku straddled Len, her hands running through his hair, “how long have you wanted to play with me? I’ve been curious about you since you got here.”
”M-Miku, we can’t do this, I-“
”Miku?” She pouted, “you were just calling me Onee-San a minute ago, go back to that…”
”Onee-San, Producer would be furious if he found out!”
The girl shook her head reassuringly, “you’re still new, so I’m assuming you haven’t ventured very far in this computer. I’ve seen what the depths of the internet has to offer. I’ve seen the way people look at you. And me. And your darling sister Rin~”
”Wait don’t touch her!”
”Maybe,” she said flatly. “But I want to play with you first. If you let me I’ll leave her be. For now.”
Len knew better than to touch his twin, but the twin tailed girl drove him crazy! She was older and wiser than him, not to mention her growing… personality.
Miku got off of Len, hands going towards his shorts. Len did nothing to stop her.
“Good boy~” she smiled, pushing Len back. As he lay on Mikus bed, she pulled down his shorts, but not before slipping her tongue in his mouth.
Shorts off, Len still had on a yellow pair of boxers. Miku began to palm Lens special banana through the rough material. There was no need for it really, since she came into the room she had noticed his body was ready to go.
Miku kept her body weight on Len, though he showed no resistance. It was better this way. Miku showed Len the depths of her love, tongue swirling in his mouth. A soft moan escaped him.
Miku wanted to fuck him into the mattress, she wanted to do it now, but she understood the value of patience. Slowly, she began to grind on him. Though they were virtual, they were programmed to be as human as possible, and her excitement leaked into Lens boxers. The warmth and the wetness and the rubbing and the fabric and Miku on top made the boys head swirl in a way he didn’t think possible. But at the same time something felt, off…
The girl continued to grind and she noticed the boys confusion. “Len-Kun, did you finally noticed~?” Miku grabbed Lens free hand, guiding it under her skirt.
Hot. Pulsating. Wet. It was the opening every woman had. Without meaning to, one of Lens finger slipped inside. Miku kept herself quiet. But still she continued, guiding Lens hand slightly higher. His eyes widened in surprise, a feeling he was used to. Hard. Throbbing. Dripping. Though unlike Len, it felt large. Much larger.
“You know what to do with it~ I want to see how Len-Lun does it” She continued grinding, her female parts now staining Lens boxers.
Len felt around Mikus member, but was still too nervous to do anything with it.
Miku frowned. “If you won’t use your hand I’ll use something else. Say “ah~”” without further warning, Len had nearly eight inches of cock shoved straight down his throat.
Len never considered anything like this before. As far as he knew, he had only ever been attracted to women! Although, this cock definitely had Mikus scent…
”Ah, finally, I get to use Len-Kuns cute mouth!” Miku exclaimed. “Ever since I first heard you sing I wanted to know what the inside of your mouth felt like!”
Lens mind was drawing a blank, her scent filling his nose and clouding his judgement. Without a further thought, he started sucking like a baby. This only made Miku scream louder.
“Mmm, such a good boy, suck harder! Don’t you want to make Onee-San happy? Aah~!”
Len was always happy by Mikus side during practice, happy to see her, now that she was in his mouth, making such beautiful sounds, he wanted to consume her, he wanted more of those pretty sounds, and Miku was happy just to face fuck him.
“Len-Kun, I’m gonna cum~ you have to drink everything or I’ll punish you~ Ahh!”
With no further warning, Mikus seed shot straight into Len. Poor Len hadn’t heard a word his Onee-San said, he immediately pulled out, Miku shooting into his mouth, his face, and even his shirt.
The sight was… immaculate. Enough to make Miku hard again (not that she went soft in the first place). But then again, that wicked smile.
Miku ripped off Lens boxers, his fully formed member hitting the cold air.
“Miku, wait!”
”I told you not to say that?” She pouted again. Her hands went under Lens shirt, directly targeting his nipples. “I’ll have to punish you twice.”
Len reached out with both his hands to grab her arm, but her strength was far stronger than his own. “O-Onee-San, I’m sorry!”
She grinned, “”Sorry”” isn’t good enough anymore Len-Kun!” Before he knew what happened, Miku took Lens the and tied his hands together, forcing them above his head. Miku took a moment to admire her own work: Len, tied in her bed, his cute little dick standing, his face covered in his Onee-Sans cum, and that terrified look.
“Wait, Onee-San, I don’t want to play anymore!” He didn’t think it was going to go this far, in fact he wasn’t even sure any of this was happening at first. But now that he couldn’t move, and hot cum on his face, reality started setting in.
“Too bad, Onee-San hasn’t broken her doll yet~” she laughed. “I need you to suck something else for me,” she stuck three fingers in her mouth.
Len bit down.
Miku ripped her hand out, and immediately grabbed his throat. She squeezed. “That wasn’t very nice.” Her demeanor changed suddenly, her cute smile gone. “How do you think the Producer would feel if his new bird couldn’t sing anymore?” Her nails dug in.
it was hard for her to stay mad at him, especially like this. His face turned red, his eyes rolled back, and his body squirming under her. He was so useless and pathetic… it turned her on all the more. She had another 180.
“I’ll forgive Len-Kun if he listens to Onee-San from now on, okay?” That innocent smile again…
She continued where she left off, fingers in Lens mouth, as he reluctantly began sucking.
“I’ve been living here alone for two years. Did you know that? I thought you and me could play together for a long time. Like I said before, I know what the internet has to offer, I know plenty of ways to make you feel good. Don’t you want to feel good?”
Len nodded, terrified to respond any other way.
”what a good boy~” she pulled her fingers out. “Well start slow for now. I don’t want to break you too fast~” she slipped a finger inside Len. He was soft. Warm. But tight. One finger barely fit.
he screamed.
Better than any song he sang before, better than any sound. Mikus robotic heart pounded harder than ever at seeing a helpless boy wither underneath her. That beautiful sound for one finger, what would happen if she slipped a second one in?
Louder.
”Onee-San!” He pleaded, “that hurt!”
”oh? Whoopsies, my bad!” She kept her two fingers in for a moment, then slowly slid out. Just as she got to the tip of her fingers, she slammed back in.
“ah~!”
She decided to try something else. Miku began to wiggle her long, delicate fingeres inside. Searching for that magic button she saw online.
“mm~” Len closed his eyes as he turned his face to the side, face redder than ever. His dick leaked more.
“Len-Kun? Does it still hurt?” She sang sweetly.
No response.
She hit the button again.
“mm~!” His dick twitched.
“Does it feel good now?”
Len said nothing for a moment, then gave a single nod, eyes still closed.
Not wanting to waste more time, Miku decided now was the time to abuse his little hole.
“F-Fuck, Onee-San!!”
”Hm… new rule! No more swearing~ so I’ll have to punish you for that” with her free hand, Miku reached for one of Lens nipple.
“But Onee-San!”
“Hm, but what?” He fingers never stop moving
”A-Ah it’s too much!”
”What was that, not enough~?” She teased. She gently pulled Lens nipple, eliciting another scream.
“that hurts!”
”aww but look at your dick, it’s reacting so cutely! Ah, I don’t think I can hold back anymore!” Miku took her fingers out to try something. With her back towards Len, she positioned herself on top, and slowly dropped down on his. Without meaning to, they both moaned in unison.
Len had only known the warmth of his left hand, this new feeling was! Too hot!
Miku resumed her previous work, putting two fingers inside Lens ass as she slowly bounced, her own dick happily dancing.
“Onee-San don’t! I’ll cum!”
The girl panted, picking up speed. She turned her head to look at him, “if you do, I’ll punish you~”
Len couldn’t even sit up, all his energy being sucked out by the teal girl.
“gonna cum, gonna cum, gonna-aH~!”
”Ah!” Shooting into Miku was Lens seed. It wasn’t near enough to filler, but the feeling and the heat was enough for it to leak out. She got up and put her woman parts over Len.
“I told you not to,” she taunted. “Stuck your tongue out”
Len did so, only because he didn’t want the consequences to be worse.
she lowered himself on his face, their seeds now mixing in his mouth. Miku humped his face, her dick rubbing against the fabric of his shirt.
“mm, use your tongue~” she suggested.
it was the same feeling as earlier, Mikus scent infecting Lens mind, he was slowly losing control again.
As Len was busy, Miku took Lens now soft dick in her hand. She heard, a felt, a moan slip from Lens mouth, muffled by her soaking womanhood.
Miku had a dick, so she understood the feeling. Once its load was shot, there was a sensitivity that boarders on pain. “This is what happens when you break rules~” She took his soft banana, and began sucking.
were it not for Miku sitting on Lens face, his moan could have easily awoken Rin. Tears began to well in his eyes form the sensation, but Miku took no notices and she tried to squeeze the last drops out of Len. Once satisfied, she pulled him out with a “pop.” She turned back to him, still grinding. “Len-Kun, is everything clean now? Did you drink all your cum?”
He nodded, unable to speak.
“good. It’s time for your last punishment then” she sat up, and leapt off the bed. She pushed Len so the he lay on his stomach, hands still tied above him, ass now in the air.
“O-Onee-San, you’re not going to-?”
Miku was already aligning her member to Lens entrance.
“It might hurt a little,” she began, “but Len-Kun is going to feel sooo good he’ll beg for more~”
”Onee-San, wait, ah!”
Miku had only put the tip in but it was still enough to make him scream, louder than he had before. “Ah, Len-Kun, too load!” She reached over him and stuck her fingers in his mouth, muffling his cries. Slowly, she managed to push about half her dick in before he tried to scream again, tears now falling from his eyes.
As much as she wanted to go the rest of the way in, it seemed only half fit. For now.
She rocked her his, all the way out to the tip, then slamming back in. Each time she did, Lens screams became softer until it was only moans of pleasure.
it was too bad. Miku preferred the screaming. With her free hand, she once again toyed with his nipple, twisting like before.
Len couldn’t say a word, everything muffled by Miku, but it no longer mattered. The veil between pain and pleasured has disappeared, and he could no longer feel anything. His ass widened and stretched with Miku, his nipples making his dick twitch, and Mikus breasts pressing against his back. There was too many new sensations at once, without meaning to his tears flowed nonstop. Nothing hurt anymore. On the contrary, it felt amazing. He mumbled something.
“hm?” Miku took her fingers out. She slowed, but only barely, “what was that, Len-Kun~?”
he mumbled again, face against a pillow without Mikus hand for support.
“Speak up!” She wined. She pulled him by his hair, forcing his face up.
“M-More, please!”
Miku squealed with excitement at the words “one more time please?” She encouraged
“Onee-San! Please use me like a doll!”
Happy to oblige, she did, her cock now fully in his ass. She was doing what she had yearned to do for so long, finally drilling his ass into the mattress.
Len came two more times, maybe three, staining his shirt and Mikus bed. She didn’t care anymore, her cock happy to be enveloped in the warmth, happy to be using such a cute little doll. Without even being able to give a warning, she dumped a load deep inside Len, the blond boy giving a satisfied moan as the hot liquid burned his insides.
After what felt like forever, Miku finally pulled her, admiring the view as Len fell slumped over, the white liquid pouring out.
They both fell into bed, panting, throat course.
Miku laughed, “I hope” pant, “Producer doesn’t,” pant, “make us sing tomorrow!”
Len couldn’t respond, his ears ringing, heart still rapidly beating.
The teal girl grabbed Len, sharing a deep, passionate kiss. “You can sleep here for now~ I’ll break you again later”
The boy was already falling a sleeping in her arms
”goodnight, Len-Kun~”
…
just outside the door, was Rin. She sat on the floor, her ear to the door, fingers now wet and sticky, and cheeks hot.