Not full on smut but it has a bit of it. I just wanted to write something- anything about this pairing. But god this took forever, maybe longer than it should, but hopefully that means that it's a tiny bit I had no ideaaaa what I was doing towards the end so sorry for the ( maybe?) bad quality at the end.

Anyway enjoy these nerds!:D

" Ugh, this is stupid" Aoba groaned flopping down on the desk in front of him and pushing his books and pencils off it. Mikado sighed and picked them up,
"It's only stupid because you don't understand the work, Aoba- San"
" You shouldn't lecture me, you're great at this stuff" Aoba halfway growled and halfway whined.
Mikado rolled his eyes, " Your'e exaggerating. Want me to teach you? " Aoba smirked at this suggestion Mikado stalled a bit since the Kuronuma only smiled like that when he thought of something fun to do.

" Why that'd be perfect, Mikado- Senpai" Aoba purred and Mikado moved over to help him. Somehow part of him wanted to know what new, twisted thing that Kuronuma thought of. He had an inkling,but the fun was in not knowing.
" So what do you need help with?" he asked and shivered when Aoba smiled at the pen in his hand.
" Everything " he says simply and Mikado couldn't help but get annoyed.
" So...what exactly do you mean by...everything?" Mikado asked chuckling slight and try to keep his cool. He heard the other creak back in his chair and hum in deep thought.
" Everything" he repeats but this time with mischievous intent. Ryugamine felt something snap inside grabbed the pen from the others hand and started to do the work on the paper in a fit of rage.

Aoba smiled to himself, pleased with the fact of being able to get his senpai into doing his work for him. Honestly if he actually tried to do the work himself he'd fare fine but it was so much better to make somebody do it for you. He watched Ryugamine carelessly. Watched his brows furrow whenever he made a mistake and had to erase, watched the way his hand moved the pen at a inhuman speed, watched the pen- he shivered and rubbed his right hand.

At the time the other had stabbed his hand he had no idea that he would grow so disgustingly attached to the wound, even to the point of taking a picture of it. He quickly deleted it afterward, yes, but that didn't erase the fact that the thought had popped up in his mind. He would even consciously gripping the wound sometimes and worry about it healing to the point that there wouldn't be a mark anymore. It was only recently that he noticed his obsession- the wound and Mikado- and unfortunately it only got worse.

It wasn't like he was a masochist or something- he definitely didn't want to get stabbed again that's for sure- but he wanted marks. Bite marks. scratch marks, hickeys- he wanted Mikado to mark him-
" Ouch!" he hissed noticing too late how he had been digging get his nails into the pen wound his and interrupting Mikado's focus.

" Aoba-kun!" Ryugamine snapped out of his daze and grabbed the other's now bleeding- but still bandaged hand, " One minute! Let me get my med-kit" He rushed out of the room leaving Aoba alone and reeling from the sudden pain. He sighed as it numbed to a low tingle in his hand and looked over at it. It was bleeding out on to the bandage and covering it in a beautiful red.

The other came back into the room, a black bag in his right hand and a wet paper towel in his left. He knelt down in front off him, grabbed his hand with no warning, and started to undo the bandages. There was no guilt in Mikado's eyes just a strange glint of worry. Aoba thought it was weird since he never really had anybody take care of him and the kind of relationship he had with Mikado made it even weirder.
" Ne" he started without thinking, earning a quick glance and nod from the Ryugamine," why do you do this.. Why do you help me?" The other looked back at him, confused,
" What do you mean Aoba-"

" Never mind. That's not I mean't to ask," he cut Mikado off quickly, knowing that asking like that would lead him nowhere. He paused, what was he supposed to say now? He had the others attention, he was right there, caring for his wound, and waiting. His lips chapped and he swallowed the lump in his throat,
" I like you" was not what he expected to come out of his throat- not at all, I mean he barely even heard himself say it, but somehow he did. The other stilled and brought his eyes to Aoba's.

...

He waited for a word from Mikado- his mind surprisingly quiet,
" Ah," was the first thing to come out of Mikado's mouth after a while of painful silence, " oh..." His face flushed red and his stammered . Aoba tried to stifle a groan and slumped forward.
" Sorry" Kuronuma breathed and finally felt the weight of what he had just done, finally felt the weight of his love for his senpai.
" N-no..that's quite alright- i- just don't know what to say..." Mikado laughed nervously, " but...s-since when?" Aoba looked up carefully meeting the other's eyes for a quick second then watching as the other looked away.

" Since..." he said slowly looking over at his still bloody- still not re-bandaged hand- hoping that the other got the message. Mikado looked over at him with a utterly confused expression and Aoba knew that he would have to actually admit his eve he believed that he could fall in love with somebody for such a messed up reason,

" Since...you..Since you stabbed me in the hand"

For a second everything was quiet until he heard Mikado laugh lightly,
" I thought you were upset about that- never considered you felt the exact opposite" This was the first time in Kuronuma's life that he had ever been so embarrassed.
" Shut up" he mumbled and turned away from him.
"So..." Mikado said after another awkward moment of silence," what do we do now?"
" Fuck if I know," Aoba shrugged but then thought for a moment," we.. could kiss?" His heart sped up just thinking about it- feeling those beautiful lips on his.

" K-kiss?" the other boy said slowly , " I haven't done it before...t-that is...kiss" Aoba slid down from his place in the chair and sat down in front of Mikado. He thought that the inexperience made him beyond cute but it wasn't his nervous side that he like the most- it was his violent unpredictable side that he loved.
" Does it really matter?" Kuronuma making the person in front of him frown , " I can teach you" Mikado looked down for a moment then looked at Aoba with resolve,
" I-I'll do it."

" Lean forward" he mumbled and Ryugamine swallowed before following his directions and leaning. Kuronuma leaned forward too, resisting the urge to take Mikado now.
" Close your eyes" Mikado blinked nervously but slowly closes his eyes anyway- something about having the other trust him was truly satisfying.
" I'm going to kiss you now, 'kay?" The other nodded and in a second Aoba closed the distance between them. The kiss was a soft, their lips mending and forming against each other. Mikado kissed him back- almost passively- and in a second, it was over. Aoba pulled back and Mikado fluttered his eyes open,
" How did you like it?"
" I-it...was nice" Mikado mumbled, his cheeks tinting red. Kuronuma couldn't help leaning in to kiss him again- he really couldn't! I mean how could he? Not when his crush was sitting there in front of him.

" Ao-" was the only thing that the other can get out before it happens and gets a little too heated.
He could barely feel the other's heartbeat over his own but he could hear it. Hear it as he licked the others bottom and top lips, hear it as he bite softly at his bottom lip, and hear it as the Mikado whimpered softly against his mouth.
Mikado parted his mouth slightly- it was just a simple action but he felt as though it meant much more than just a great make out session- and Aoba doesn't hesitate to dash his tongue over his teeth and top gums.

" Ah..mhm-ah..." Aoba is pretty sure that Mikado's breathless moans are some of the best music he's ever heard, it makes him wonder what his screams sound like. But this simply wasn't enough, he needed pain.He broke the kiss only to whisper,
" Bite me"Ryugamine's eyes snapped open and he stared at Aoba like he was insane,
" Wh-where?" Kuronuma kissed Mikado again.
" Anywhere, everywhere, just bite me" He said watching the other's face twist with doubt, " please- Mikado...senpai" He could see Mikado consider it and then he nodded quickly, face blushing red. Ryugamine surprised him with a kiss and before Aoba could complain he bit down on his upper lip. It was nice but not nearly hard enough . It was like the other read his mind because a second later he bit down hard enough to draw blood and a gruff moan from Kuronuma.

Mikado pulled back and looked at Aoba again this time a small smile a feature on his face,
"W-was that any good?"

" Yes. It was...perfect" he breathed feeling his own face stretch with a grin.
" are we done yet? " Mikado asked and Kuronuma frowned at the thought of stopping.
" Nope" he said and started kissing Mikado again. His senpai was the eager one this time, pushing him back quite forcefully against the base of the chair. Being too caught up in the kiss he didn't notice Mikado's hand stalling on his right and rubbing his wound. Aoba only noticed when the other grabbed his hand and squeezed.

" Ahnnn-...Mikado-senpai!" he moaned even surprising himself. He now accepted the fact that he was definitely a masochist. Ryugamine's eyes looked like they were smirking at him- despite him not smiling- and it was more than hot.
" Yes? Aoba-chan?" he purred and Aoba felt the cold in his voice ghosting over his lips. He suddenly felt powerless and it finally dawned on him what he was letting Mikado do to him.
He glared at the his senpai feeling frustrated in all kinds of ways but he couldn't find the strength to move away so instead he just leaned back in and kissed Mikado again.

" Nothing" he said and suddenly gave no more fucks but only because Aoba rather do this than study any day.