Note: Okay well Lens basically a Uke but is Seme when it comes to sex.

And a Special Thanks to Gin Nanashi for editing my Story for me^^

Chapter 12

Unable to sleep, the brunet sighed. He could not help but wonder what Nagiri was going on about earlier that day.

He wondered if Len really was one of those humanoids. And if so, then what was his main goal? And what was that man obsessed with that made him make these humanoids?

Kai frowned as he laid on the double bed next to his blond, who had gone to bed in silence. Thinking back on it now, the brunet noticed that Len had not said a single word to him since they had entered the room.

Turning to look at the blond who was facing his way, Kai tilted his head as he watched the boy. Long and thick lashes fluttered lightly as his chest raised and fell. Kai leaned closer to his partner and slowly looked down at the bright yellow numbers.

"Zero-zero-zero-four…" He mumbled softly under his breath and nipped at his bottom lip before slowly pulling himself away from his bed. He walked around it until he was behind the blond. Carefully holding his breath, the brunet slowly raised a hand and touched the back of the blond's neck, pushing in the skin-colored door.

Feeling his plug-in door open, Len's blue eyes snapped open and froze when he noticed that his master was not in the place he should have been. "Kai-kun, what are you doing?" He whispered steadily but his tone was ice cold.

Kai shivered at the voice and leaned back, looking away. "N-Nothing." He mumbled his response. The blond was not pleased and growled slightly, pushing himself up and closing the door on his neck. "Don't lie to me. What were you doing?" He demanded. His blue eyes sharpened and narrowed almost dangerously.

Kai trembled at the glare and looked away again, biting his bottom lip. "I-I was w-wondering about w-what N-Nagiri-" He began only to be cut off by an angry snarl. "I don't give a shit what she says."

The brunet gasped when the blond swore, surprised at how acrid he was acting. Kai sighed and walked back to his side of the bed, sitting with his knees drawn up to his chest. "I know I-I've upset y-you. But I w-was just wondering… I mean… Y-You turned u-up on my door s-step without an e-explanation."

"I told you why I was, why I am, here." Len growled, feeling increasingly more annoyed at the brunet when he shook his head negatively. "I d-don't think being h-here for my s-s-sexual needs count as a-a reason." Kai mumbled, nipping at his bottom lip while Len let out a soft huff and rolled his eyes. "I don't know." He snarled as he crossed his arms across his chest in an almost defensive manner. Kai shook his head and bit his bottom lip hard to stop himself from saying anything he might regret before he slowly nodded his head in concession. "O-Okay Len-kun…"

A moment of tense silence passed before the blond sighed and shook his own head. His bright blue eyes softened to his usual disposition. "Look, Master, I-I understand that you're confused but… please… don't ask me anymore… I don't really… remember anything."

Kai blinked and tilted his head. "W-What do you remember though?"

Shoulders slumping in submission, Len sighed softly and turned to look at his hands. "I remember a couple of things. I remember a laughing girl." A huff of amusement left his lips. "A laughing girl?" Kai repeated softly, tilting his head in confusion. "Yeah… I remember feeling really protective over her. It was like she was my younger sister… or maybe an older one." He whispered the last part more to himself than to his brown-haired master.

"What a-about a name?" Kai asked softly, not wanting to scare the blond into silence. A thoughtful look crossed onto his face as Len glanced up before a gentle smile bloomed on his lips. "Rin. Her name's Rin… And… I think… We were twins." The blonde laughed softly as amber eyes widened in surprise. "Twins? Do you miss her?" Len nipped at his top lip as an ambivalent, almost bitter, expression came forth. "Can't miss something you don't remember."

Kai pursed his lips. "You've got to miss her at least a little." He said, making the other shrug. "I guess. But I don't really remember her at all. Only a few pictures. Like there's a mental photo album in my head."

"… D-Do you remember anything else?" The brunet asked softly. "… Yeah. I remember a couple of other people. Hmm… … … I remember a blue-haired man." The blond said, running a hand through his hair. "Blue hair?" Kai whispered, blinking rapidly in shock. "Blue…" He repeated before he furrowed his brows. "Like the man who dropped you off at my home…"

Len tilted his head. "Did he have matching blue eyes? And maybe a scarf?" He continued on, making Kai's eyes widened in remembrance. "Y-Yeah… And a white jacket!" The brunet added in excitement as he leaned forward. Len smiled widely, "Kaito-senpai…"

"Kaito…?" Kai tested out the name, tilting his head in confusion. "Mmhm~" Len nodded. "Yeah. I think he was one of the older models. I think that's why I call him Kaito-senpai. I remember him being like a… a father, or maybe an older brother… Him and Meiko-senpai… They were the oldest. I think. They looked after us…" Len said, still smiling as he lost himself within his scattered memories. "Oh… man. I'm so happy that I'm not the only one… Kaito-senpai is a Vocaloid too! So I'm not the only one…" The blond whispered though Kai could hear the excitement in his voice.

"Maybe we'll see him again soon, Len-kun." Kai smiled at the blond who grinned and nodded "Yeah. I really hope so… I would really like to see Rin again… I wonder if she's got a great master… someone like you." He said, making the brunet blush brightly. "M-Maybe?"

"I really do hope so…" Len muttered before shaking his head. "Do you remember anything else?" Kai asked, leaning forward some more. "Mm… Oh yeah! I remember a girl with green hair pulled into-" "-pigtails." Kai cut him off, making the blond blink and look at his master in surprise. "How did you…?" Kai blushed even brighter under his gaze and shifted uncomfortably. "I d-don't know w-why but I just f-felt like I know w-what she looks like…" Kai shrugged, looking down at his lap as Len tilted his head in thought.

"That's… weird…." Len mumbled softly before shaking his head. "Anyway, her name's Miku. She was… well, I have this feeling that she was like an older sister!"

"Miku…" Kai repeated. The name sounded familiar to him. He closed his eyes as a strange feeling of nostalgia settled over him and smiled softly. But his calm did not last as the blond suddenly jumped him. The brunet gasped as he suddenly found himself on his back with the blond over him on all fours. "L-Len-kun?"

Len tilted his head with a sly smile on his pale lips. "Master~ We just had a sensitive moment so~ Let's make love~" The blond robot purred as his eyes twinkled. "B-But this i-isn't our h-home…" Kai whined lightly, blushing a brighter color when Len simply quirked a brow. "Do I look like I care?"

Kai sighed at the other's indifference before pulling the blond down so that their lips pressed against each other. A gasp left the brunet's lips when Len began to grind his hips against his own, rubbing their rapidly hardening groins together. Feeling the boy's lips part, Len quickly pushed his tongue in and began to play harshly with the brunet's.

Once the blond pulled away with a pop, he looked down at the brunet with a smirk. "This time's rough, ne?" He said cheekily as Kai's eyes widened. "R-Rough? W-What do you mean by that?!"

Len tilted his head before chuckling. "You'll see~" He chirped, pushing himself up so that he was straddling Kai's hips. "Now then… Where should I start?"

Kai blushed darker before gasping when the blond began to pull at his boxers. He reached down to grasp the clothing only to have his hands slapped away. "Now, now, Master. These need to come off." Len sang before smirking as he tossed the garment over his shoulders.

Grinning at the pale skin, Len leaned down and began to nip at the brunet's special place. "N-No, Len-kun. Stop." Kai cried, trying to move away from the blond who sighed in mock disappointment. "Oh Master, I was really hoping I wouldn't need to do this~"

"D-Do w-what?" Kai asked, feeling his stomach curl as the blond sent him a twisted smile before he turned and pulled his bag from the ground. Quickly rifling through it, Len soon pulled out a coil of yellow rope.

Kai's eyes widened as he looked at the rope in the blond's hand. "Y-You've been carrying that around w-with you?" He squeaked, moving his arms protectively to his chest before gazing warily at Len when he began to giggle. "Mmhmm~" The blond nodded cheerily. "I wanted to use it during an outing…" He purred with a perverted grin. "It's one of the things I ordered." He added with a careless shrug.

Kai blinked before he frowned in thought. "One of the things you ordered?"

"…" Len simply smirked wider and leaned closer so that the two were face to face with only a millimeter of space separating their lips. "I want our future times to be much more… exciting~" Len said, winking before closing the gap once again. Kai melted into the hot embrace.

When the two pulled apart, the brunet, though dazed, quickly noticed that he couldn't move his arms. Letting loose a few confused sounds from the back of his throat, the boy struggled to pull his arms down from the bedposts. "W-What the-?!"

Len chuckled as he watched his master's face flush in embarrassment. "You won't be able to get away now~"

Kai looked up and gasped as he saw the yellow rope tied around his arms and to the bedposts. "… Oh." Before he could voice his opinion, Kai yelped as the blond suddenly began to kiss and nip at his neck. "I told you, Master. We're playing rough tonight." He whispered against his lover's wet neck before Kai heard a loud ripping sound.

Gaping in shock, the brunet watched as the blond threw away the ripped up shirt. "That w-was my favorite shirt!" He cried as the blond smirked cheekily. "Too bad. I prefer you shirtless after all~"

"But L-Len-kun-" He began only to be cut off as said boy suddenly bit down hard on his neck, making the brunet cry out as the other lapped at the wound and hummed at the metallic tang of blood as if he were some kind of a bloodthirsty vampire.

"Ah…" Kai gasped when Len started to nip down his chest. "Hmm… Tell me what you want, Kai-chan." The blond flicked at one of Kai's sensitive nipples, making said boy's hips to arch up in want though he was held down.

"I-I w-want y-you to…" Kai mumbled, his once pale cheeks burning with heat as Len moved down to his stomach and bit down hard on his right hip, making the brunet cry again. "Hmm? Want me to what?"

Kai whimpered and shook his head. "I want you to t-t-" The brunet gasped again as the blond raced one of his fingers up his thigh. "Hmm? I'm sorry?" Len said playfully.

"I-I want you to-to tongue fuck me!" Kai squealed loudly. His eyes closed tightly as he felt the blond suddenly pull away from him. "All you had to do was ask, Kai-chan." Len smirked before diving back down. Kai gasped as he felt that strong, hot, wet muscle suddenly lick at the tip of his stiff member.

"Oh, Kai-chan. Look at all the yummy cum that you're leaking." Len smirked at the arousing sight as his dick twitched in excitement before he suddenly lashed at it with his tongue, making Kai moan loudly.

"Oh-AHH~" Kai let out another cry when the blonde suddenly devoured his member and twirled his tongue around the tip before biting gently, making Kai jump and whimper as he tried hard to get his hands free only to fail again and again.

"L-Len-kun…" He whined, struggling to move his arms once again in order to grasp that bobbing blond head as Len thoroughly tasted the brunet, nipping here and there every now and then, making the brunet squirm in pleasure. "Aaahhh~"

Kai's eyes began to tear up as he felt the familiar tightness build up in the pit of his stomach, making him shiver. "L-Len-kun, I'm g-going t-tooooo-!" Kai let out a loud scream as he finally came into the computer's mouth.

Len smirked and tilted his head as he pulled away and looked down at the flushed face of his lover as he struggled to catch his breath from the blow job that was so very different from his first.

Nodding to himself in pride, Len slowly stood and began to pull off his own clothes. Hearing rustling and the sound of things dropping to the floor, Kai turned and blushed at the sight of his computer's naked body.

His eyes kept flickering from the door to the blond. And, oh god, it would be oh so very embarrassing if someone walked in right now. But Kai didn't have any time to dwell on it when his legs were suddenly pulled up and spread apart to reveal that private little hole. Taken by surprise, Kai didn't notice the blond tying his ankles to his hands until it was too late.

"Len-kun!" Kai cried as his eyes glanced up at his tied limbs before he gasped and lifted his hips upon feeling a hot tongue prod and enter his hole. "L-Len-kun…!"

Len hummed as he began to twirl his tongue around the hole before thrusting it into the warm hole, making Kai squirm and moan loudly. Len tightened his grip on Kai's hips before he finally pulled back and wiped away the saliva trailing down his chin.

"Ready, Kai-chan?" Len asked, tilting his head as he teasingly brushed his fingers across the round flesh before leaning closer and biting down on one of the cheeks. The brunet whimpered with need.

Pleased with the sound, Len pushed himself up into a standing position before resting his body against Kai's curled up form.

"Ah…!" Kai gasped when the blond pushed his member into the brunet's wet hole. "L-Len-kun…!"

"Ah… Ohhh~ M-Master…! You're so tight… even tighter than before…!" Len moaned as he began to rock his hips back and forth, enjoying the way his master's muscles clenched to try and keep him in. Pulling out until just the tip was still inside his partner's hole, the blond gave a brief smirk before slamming back in with a grunt, making the brunet scream at the rough entrance. Gradually, the blond's pace grew quicker and rougher with each thrust.

"Say my name, Kai-chan~" Len moaned before turning and biting the side of Kai's leg, leaving yet another red mark on the brunet's body. "Say. It. Kai.-chan!" Len smirked as he gave a jarring thrust with each word.

Kai gasped and nipped at his bottom lip. "Oh-! Ah-! I…! L-Len-kun!" His moans were incoherent as his mind was lost in the feeling of the blond moving faster, moving harsher, in him.

Panting, Len let his head roll to the side. "Hm? What was that?" He asked breathlessly, pulling all the way out again before slamming right back in, making Kai scream once again. "L-LEN-KUN!" He cried out, making Len smirk. "Ah-! D-Does this feel good?"

Kai moaned and nodded. "Oh~ Hai~ Yes!" He whimpered as the blond twisted his hips and pulled Kai's own hips far up so that he reached deeper into that tight hole. "Do you like it? Do you like this? The way I'm fucking you?"

"Hai-! Hai-! Hai-!" Kai moaned before gasping when a hand suddenly wrapped around his bobbing member, pumping him in time with each thrust. "S-So hot…" Kai whimpered as his eyes clenched shut upon feeling the heat build up in the pit of his stomach.

"L-Len-kun-! I'm g-going to c-come-!" Kai whimpered, biting at his bottom lip before letting out a loud mew as Len slammed relentlessly into the brunet's hole. "G-Good…! Come f-for me…! Master~" He moaned before pulling on the yellow rope, releasing the brunet's arms and legs.

As soon as he could move them, Kai wrapped his legs around the blond's hips in order to pull him close. He would've blushed brightly if he weren't already flushed as he suddenly had an urge to tease the boy back. Swallowing his moans, Kai rocked back against the blond's thrust and smiled teasingly at him as Len leaned over and pressed his lips against Kai's.

Once the two parted to breathe, the brunet threw his arms around Len's neck to prevent him from moving too far away from him and brushed his lips against the other's ear. "D-Do I f-feel good?" He whispered coyly, causing the blond's breath to hitch as his flushed cheeks darkened before he nipped at Kai's neck. "Oh so good, Master~" He smirked, feeling his own heat build up in the pit of his stomach.

And after a few more deep thrusts, both boys came hard together. Kai whimpered as he felt that beloved hot liquid spray the walls of his sacred spot before he sighed in happiness as the blond sprawled bonelessly on top of him. "L-Len-kun." He murmured softly as he gently wrapped his arms around the boy, nuzzling his soft blond locks. "Hmm?" Len glanced up at the brunet with a smile of his own before kissing one of the bite marks on Kai's neck. "Rough i-is okay… b-but I like our r-romantic love m-making better." He said shyly, making Len laugh. "Yeah, me too."

Their sweet talking quickly cut off as both jumped when the door suddenly opened to reveal a sleepy rosette. "Hey, guys. Are you alright? I heard screaming and-" She blinked at the sight of two naked boys blushing so brightly that they could make a tomato jealous of their color before letting out a small squeal. "Oh my god! You guys are so cute!"

Kai let out a cry before hiding his face into Len's neck. The latter who ended up blushing even darker as he quickly pulled the blanket over their naked bodies. "Get out, Sakura!" He squeaked, having been caught off-guard.

Sakura simply giggled and bowed. "See ya tomorrow morning~" She smiled cheerfully before walking out and closing the door. A few second later, they heard: "Hm? Oh. Len's just giving Kai some love~" Her teasing voice could be heard on the other side, obviously speaking with another.

"I told y-you someone w-would walk in…" Kai whimpered, letting his head fall back as Len shook his head. "Why are we friends with her again?"

Kai blinked and looked at the blond with a pout. "Len-kun?"

"Hmm?" Len turned back to look at the brunet who was still pouting at him. "I just noticed something. You've been calling me -chan… I'm not a girl…"

Len simply widened his eyes in an innocent manner. "No I haven't." He said, causing Kai to shake his head. "Yes you did." Kai replied adamantly before his breath hitched when Len gently kissed him on the cheek. "No I haven't… Kai-chan."

"See! You just did!"

"Sleep, honey."

"Len-kun~!"

Note: plz review^^