A/N: I honestly believe more MikaYuu fanfiction should be in existence, so here it is~ A small little one-shot based off an OTP prompt I found on tumblr. This one-shot is an AU where Mikaela and Yuu are roommates.

Disclaimer: I do not own Seraph of end/Owari no Seraph.

It was just one of those unfortunate nights where it was unbelievably chilly. The heater was broken, so the entire house was practically freezing cold. Yuu huddled in the corner of his bed, shivering under his blanket. He breathed into his palms, at an attempt to warm himself up, but still shivered.

''This cold is ridiculous...'' He mumbled, tightly clutching the sheets. Yuu stared over at Mikaela, who somehow managed to fall asleep despite the cold. He looked so peaceful, and calm in his sleep. Completely different from his character when he's awake, the bubbly, energetic kind boy Yuu knew. Just staring at him was enough to warm his heart, but it didn't stop him from freezing half to death.

His heart nearly stopped when noticing the blonde stir in bed, and eventually his eyes fluttered open to look at the emerald eyed boy across from him. Mika sleepily rubbed his eyes, and looked at the huddling raven-haired boy. ''Yuu-chan? Are you cold?''

''No, I'm fine. Go back to sleep.'' Yuu lied, looking away from the blonde. Though he had to admit, Mikaela looked sort of adorable with his messy bed-head hair. He even caught himself blushing at the sight of him, and quickly hid it.

A sigh escaped the blonde's lips, then he climbed lazily out of bed and went over to Yuu. Sitting in the boy's bed, he placed his forehead against Yuu's, causing said boy's face to turn as bright as a tomato. ''You don't seem to have a fever.'' Mikaela confirmed.

''Obviously.'' Yuu grumbled with a blushing face, ''That wasn't necessary.''

''All I heard was you complaining about how cold it was.'' Mika said with a slightly amused smile.

''How else will I be able to cope with this cold ass room? The damn heater isn't working.'' Yuu whined, body still shivering.

Mikaela blinked, staring at him silent for a moment then got an idea. He whispered something into Yuu's ear, causing the boy's eyes to widen. ''W-What the hell? A-Are you serious?!''

''It'll help keep you warm.'' Mika chuckled softly, a small blush rising on his own cheeks. ''Right?''

Biting his bottom lip anxiously, Yuu debated the idea. It was either freeze his ass off, or... ''...Fine...'' He looked away with a flustered expression. ''N-No funny stuff though.''

''Of course not.~'' Mikaela teased, knowing Yuu was easily embarrassed at times. Mikaela laid down on his side on Yuu's bed, and gestured for the boy to come. Despite the slight hesitation, he laid down beside the blonde whom had hugged him closer to his body. Much to Yuu's amazement, Mikaela's body was extremely warm, and he even found himself huddling closer to him.

''...You're... so warm...'' Yuu muttered softly before drifting into sleep, little did he know that Mika heard and even let out a small laugh at the comment. Normally, 'roommates' wouldn't be so comfortable with doing this, but Mikaela and Yuu had a relationship where they'd be confused for lovers, but weren't quite lovers. Mikaela never really minded being mistaken as such, keeping his feelings to himself, but either Yuu was really oblivious and perfectly fine with such intimate contact, or he was hiding his feelings as well. Didn't matter to the blonde, all that concerned him at that moment was keeping his beloved Yuu-chan warm, and that he shall do.

He hugged Yuu against his chest, and rested his face on his hair. Mika closed his eyes to fall asleep himself, when he was startled by the feeling of fingers intertwining with his own. His eyes widened slightly, but he smiled and gave Yuu's hand a small squeeze before drifting into a deep sleep.

''Goodnight, Yuu-chan.'' The blonde mumbled quietly.

''Goodnight, Mika.''