Disclaimer: Vocaloid and the cover image does not belong to me.

Warning: This is Rated-T for a reason.

Being weak and wimpy when he was a child, Kagamine Len has always been bullied. He was friends with no one, until than one rainy day when a girl a year younger from him drove the bullies away, turned to him and said, "Don't cry anymore, Len-chan! I'll be your onee-san from now on and protect you, so don't worry!"

"Len-chan!" A girl, blond and small, peeked through the curtained windows, her legs dangling outside the window sill. "Pst!" She whispered in a loud voice, trying to catch the attention of the person bundled under the covers. Nothing. He didn't even twitch.

Rin let out an exasperated breath. He's grown taller and all, but the way he sleeps never changes. A hurricane, a tornado and an earthquake could pass but he'll remain drowning in his dreams. It's starting to get annoying, really.

Using her hands to lift herself from hanging on the sill, she leaned forward, only to give out a shriek when she lost her balance and fell face first on the floor. She's sure that his mother heard that loud thud. But even after that, the figure under the thick blankets didn't wake up. His soft snores reached her ears.

"Len-chan! Seriously, we're going to be late!" Rin chastised, dusting herself off and walking to the bed. "Hey!" She raised her voice, poking him on the side–or at least, she thinks it's his side. Frowning when he didn't move, she used both of her hands to shake him. This is practically a daily routine for them, how he never get used to it, Rin has no idea.

He grumbled, incoherent words coming from him before rolling over. He's still not awake. Goodness. Rolling her eyes, Rin grasped the blanket and tugged it away from him. He immediately curled up. Rin half expected him to raised his hand and suck his thumb in his mouth. His sleeping face never changes, he still looks like a child when he's like that. Vulnerable and innocent, like an angel. Or more like a mischievous devil, because they have twenty-five minutes before school starts.

"Len-chan!" Rin shouted, dragging out the syllables as she pressed her palms on both of his cheeks and squeezed them together. She giggled when his lips, pouty from sleep, imitated that of a fish. Feeling devious, she shook his head sideways while repeatedly saying, "Wake up!"

"hey!" He grumbled weakly before slapping her hands away and throwing his pillow over his head. "Go away." Rin could hear him mumble, his voice husky from sleep, muffled under the pillow.

"We're going to be late! Come on!" Rin exclaimed, pulling the object from his face. He was already awake, and his blue eyes were glaring straight at her without mirth. But with his hair all messed up and a dried trail of drool on the corner of his mouth, Rin couldn't help but laugh instead of being scared.

"You're so noisy Rin." Len frowned, sitting up and rubbing off the sleep in his eyes. "I told you many times that you shouldn't just barge in my room!" He pinched both of her cheeks.

Rin squeaked, frowned, and slapped his hands away. Standing on his bedside, she crossed her arms and looked down on him, "Because I'm your onee-san! Big sisters are supposed to take care of their little brothers!" She grinned smugly, ignoring the unexplainable look that crossed his face. "Now get moving, ne? I'll be waiting downstairs!" Of course she's always welcome here, they've been neighbors since they were babies. She just chose to barge in through the window because it's the easiest way.

Plus, since two years ago, he started to always lock his door, making it harder for Rin to just barge inside for them to hang out. When she asked him about it, he just said, "Because I need my privacy," while avoiding her gaze. So the window really is the best route, especially since he always forget to close it.

Even though Rin doesn't want to admit it, she knew that they're starting to drift apart from each other. She doesn't want that. She treasures him deeply. Like a younger brother, because she never had the chance to have a sibling, and neither did he. She would to anything to keep him on her side…forever.

Giving him another cheeky grin and a mock salute, she opened the door and left.

"U-um…Senpai, I like you! Please go out with me!" Red faced, head down, the girl exclaimed, her voice cutting through the silence in the rooftop. Len stared at her, and he couldn't help but be amused. After rejecting many confessions, how could they not get that he's simply not interested?

"Sorry, but I have someone that I like." He replied, giving her an apologetic smile.

"I–I understand! Sorry for troubling you!" Blushing madly, the girl squeaked before running away. Len listened to the sound of her footsteps until he heard the door slamming close. Sighing, he walked to the railing and leaned against it.

"Len-chan!" Rin called out in a sing-songy tone, appearing on the opened door. She waved when he spotted him, gesturing to the two bento boxes on her other hand. Even though, she knew that he hated it when she adds the '-chan' after his name, she always does that. It was annoying at first, but he eventually got used to it. The girl's too naïve for her own sake.

"Let's eat, ne?" She smiled, tilted her head slightly to the right. He must be hungry, she thought as he eagerly sat down beside her. "You always forget you lunch." Rin laughed, handing him his bento.

"You made another girl cry, I see. I bumped into her on my way here." Rin remarked, raising a brow at him in accusation. "Let's see…" She trailed off, fingers making counting gestures as she counted mentally, "She's the seventh this week." He only groaned in response.

"Are you gay?" Rin asked innocently. It's one possible answer. He's cute, single, intelligent and great at sports. But as far as she knew, no guy has ever confessed to him. Maybe that's what he's waiting? But seeing how he choked on his food and glared at her, she doubted it.

"What?!" He shouted after he drank nearly all of the water in the bottle she brought. "No, that's not it." He rolled his eyes. "I like someone else." Rin stopped, chopsticks half-way to her mouth. Did she just hear what she thought she heard? If that didn't make her squeal, then the cute blush that spread over his cheeks certainly did. He never blushes. Dang, the girl must've caught his heart so bad.

"Really?!" She squealed, setting down her lunch and grasping his arm with both hands and shaking him. "Who? Who? Who? What year is she in? Is she pretty? Tall? Tell me!"

He didn't answer for full thirty seconds, looking away from her to hide his face that was becoming redder by the second. Rin laughed and poked his cheek. "I like you." He finally replied, eyes looking anywhere but hers.

"Huh?" Rin raised a brow, "Me too!" She grinned.

Blinking as if in surprise, Len snapped her face in her direction so fast that it made her wonder how his neck didn't break. "Really?" He asked with a red face.

"Of course! I did promise to be you onee-san, right? So I like you very much, Len-chan!" (A/N: why, why oh why are you so dense?!)

He suddenly froze, head hung down as if in defeat.

"Len-chan?" Rin asked worriedly, releasing his arm from her tight grasp and brushing his bangs off his forehead to look at him properly. "Are you sick?"

He mumbled something and Rin strained her ears to hear it properly but it was too uttered low to be understood.

"What?" She asked, confusion written all over her face.

"Nothing." He glanced at her before picking up his lunch and continuing to eat. "I'll tell you properly someday." He added through mouthful of food.

"I told you a thousand times to not talk while chewing!" Rin scolded, frowning. He only grinned at her cheekily before he chewed noisily, knowing how that riled her up. Fisting her hands in annoyance, she gritted her teeth and groaned. He laughed, being the cheeky brat he is.

Only after they finished eating and retreated to their respective classes did Rin realize that Len never did answer any of her questions.

Rin collapsed on her bed with a sigh. It had been a tiring day. Untying the bow above her head, she threw it at the direction of her dresser. It landed a few feet from it, and she told herself that she'd pick it up later.

After that conversation in the rooftop–which happened four days ago–, Len seemed to be avoiding her. He only uttered one syllable replies to her questions of 'are you angry?' and their conversations slowly got shorter and shorter until he just stopped talking to her and avoided her completely this day. He even refused to go home with her today. What's with that? She doesn't get it, he looks so okay before what happened in the rooftop, so what happened? Was it something she said? She doesn't remember anything that could make him angry.

Maybe it has something to do with the one he likes? He did mention about his privacy and stuff…

"That's it!" She exclaimed, as if she just discovered the mysteries of the world. Jumping from her bed, she pumped her fist in the air. "That must be it." A token of apology would be nice. Len loves chocolate and bananas, and he once told her that he liked the chocobanana cake that she baked once. She was grinning as she quickly swapped her uniform with a tank top and a pair of shorts.

She was smiling widely as she ran out of her room to the kitchen, wore the apron and proceeded to bake.

-an hour later-

"Len-chan!" Rin whispered-shouted from her window. She just finished making the cake, and it was very delicious. She's sure that Len will like it very much. Fighting off a smile, she continued to call his name. He couldn't be asleep already, it's way too early. But he doesn't seem to be in his room. Maybe he has to stay for club practice? He did join the soccer club last month.

Puffing her cheek, she took the plate from her bedside table, climbed the sill, and crossed the property to Len's room through the large tree between their houses. She's really thankful that it has large branches and that he taught her how to climb trees when they were young.

His window was slightly ajar but his curtains were closed, that's just Len being Len. She kept on reminding him to shut his window close unless he want to wake up one day with all of his stuff stolen, but he just rolled his eyes at her and called her a push-over. Insolent brat.

Well, she's pretty thankful about it now. Sliding the glass open, Rin set her foot inside his room. Her feet sunk into the carpet, and she wiggled her toes with a chuckle. She always loved walking barefoot in his room, it tickles her feet. One day, she's going to buy a carpet like this.

His room was in its usual state, not messy, but not entirely clean and organized either. His bed was unmade, his CD collection neatly piled up in his shelf and some books, papers and pens lay scattered on the floor. It's obvious that he's been studying, like how he does every night before he went to bed. He is such a nerd.

Only the person who owns the room is missing. Sighing, she set the plate on his study table and she sat on his bed, deciding to wait for him. He should be home soon, she'll just lay down for a few minutes. She slept late last night, and her body is starting to feel heavy. His scent surrounded her as she rested her head on his pillow. She always liked how he smell, it was a scent that she never experienced before. His own, unique fragrance. She yawned.

"Rin!" She mumbled some incoherent words and swatted the hand on her shoulder away, rolling sideways. Only to feel the bed leaving her back and the floor replacing it. A groan escaped her lips and she rolled on a sitting position, rubbing the sleep off her eyes.

"Len-chan!" Rin grinned, standing up as she adjusted the strap of her tank top that has fallen down. "I came here to–" She stopped, eyes widening when she saw the glare that he was giving her.

"I already ate the cake." He murmured. "More importantly, what do you think you're doing, sleeping in my room?" A frown marred her face and she scowled at him in challenge.

"Why?" She asked, raising her chin as she gave him a confused look.

"Because I'm a guy and you're a girl. You shouldn't sleep in a guy's bedroom." He made it sound like he was talking to a toddler, that annoyed her a bit but she quickly shut it down.

"What? But Len-chan is my little brother, when did our genders change that?" Rin grinned, patting him on the head. It was a bit hard, considering that she just reached his shoulders.

An unknown emotion flashed in his eyes. His face suddenly shut close and a dangerous expression replaced all the playfulness, Rin watched his face in surprise. She found herself being pushed down on the bed, her back hit the mattress with a soft thud. He was suddenly straddling her, pinning her hands above her head with one hand while the other was braced beside her head to prevent him from crushing her with his weight. Confusion and shock flooded her brain, she tried to break free, but when did he become this strong ?

"Len…?" She whispered, searching answers in those hooded blue eyes. He frowned, staring at her with an blank face. Suddenly, she realized how different he became. Like how his face no longer held that childish roundness, how his shoulders are now much larger than hers, how his hands became so much bigger and how he looks so mature now. He isn't the cute Len-chan whom she always saved from his bullies in childhood anymore. Realizing that felt like a punch on the gut.

"That changes everything. I'm stronger than you." He said in a husky whisper, tightening his hold on her wrists. "We're not kids anymore Rin." Then, to her surprise, he bent his head low and licked the corner of her mouth. "I stopped being your little brother years ago." He whispered against her cheek just before he captured her mouth with his.

Rin couldn't move. Her thoughts were jumbled and her mind's a mess. When did he become like this? Why didn't she notice it when Len grew up? Why did she keep treating him as her little brother? She couldn't think and her lips remained frozen. He nibbled and licked and bit her lips, eyes closed, his lashed tickled her cheeks. Kissing is a foreign thing to her, things like this never crossed her mind, so when his tongue slipped past her lips, it felt like her head was going to explode. It felt weird and so unfamiliar. But at the same time, it felt warm and made her stomach flip. She could taste the cake that she made as he tangled his tongue with hers.

Her cheeks felt hot and she closed her eyes in an attempt to hide her embarrassment. Her red face is a dead give-away. What was she supposed to do? Is she supposed to respond like the girls in the mangas she read? But it's Len-chan, the person whom she thought as a little brother for ten years!

"No…stop…"She managed to whisper, trying to tug her hands free. She squirmed under him, tilting her face away from his. He licked his upper lip, as if savoring a taste. Her eyes followed the movement. Watching it made something flutter in her belly, she ignored it, blushing at her thoughts.

He climbed off her, sitting on the edge of his bed with his elbows on his knees, he wove his hands through his hair numerous times. From the way that his shoulders were heaving, Rin's sure that he's having an inner turmoil. Normally she would comfort him through it, giving him smiles and grins while patting his head, but after what happened, she doesn't know what to say anymore. What happens now? Shouldn't you be kissing only the person you like?

"You shouldn't barge in a guy's room. Do you see how easy that can be done to you?" It was a question that required no answer, so she remained quiet. She adjusted her clothes and touched her hot cheeks with her palms, willing for the red to go away. Her thoughts were still a jumbled mess, and she wanted to run away from here, but her legs won't move. "I love Rin the most." He whispered lowly, but she heard it. Her eyes went wide, her heart thudded faster in her chest and her cheeks reddened further.

She opened her mouth to speak, but before she could, he already stood up from his bed and walked out of the room, leaving her flustered and confused even after she crossed the tree and lay on her bed all night.

A/N: Yo! Magic2Dreamer reporting with another cliché! OwO

Do you like it? This will be a very short story. The next chapter will be the last one :)

I did this to practice on writing romance, but I can't believe that I managed to write that kissing scene. It's my first time writing it XD

So, yep, I wrote this to in preparation for the oncoming romance in my other fanfic, Bullet. 'ello to all that read it already!

I hope it isn't so bad. I have 0 experience on romance in writing and in real life X3