This world needs more Shinya/Yuu love. ShinYuu

I am sorry for the grammar mistakes.

I don't own Owari no Seraph nor the characters.

"Guren, you can't be serious! I am already fifteen! I don't need anyone to babysit me while you are on a trip with your girlfriend and busy fucking her!" Yuu sat on a cushioned black chair with an expression of a killer. 'Why does he always treat me as if I was a kid?!' he thought angrily.

"Because you ARE a kid." Guren cooly answered with a snort, easily guessing what was Yuu thinking. He was like an open book after all, his expression easy to read. After taking care of Yuu for several years he know him very well. They were practically brothers. You could say step-brothers.

"Do you not remember what happened when I left you alone at home, baka-Yuu? You set our kitchen on fire! There is no way that I am leaving you alone at my apartment. Who knows what would you destroy next." Yuu clenched his teeth together at Guren's harsh words.

But it was true. But he just wanted to make surprise cookies for Guren, to show him that he wasn't an useless child that only caused trouble. Both at home and in school. Maybe...he is really a good for nothing monster. Just as his parents said so many times in the past.

"I am n-.." Yuu was interrupted by a knock on the door and immediately glared at it. He could just hope that his 'babysitter' wouldn't be Goshi, Mito or Shigure. He would even accept Sayuri to be with him for the weekend that Guren won't be at home.

The last time Goshi was alone with Yuu, Guren found a traumatized Yuu with magazines of half-naked or worse naked women piling up on the poor kid. And Yuu was even slightly drunk.

They both agreed that Goshi wasn't allowed to be alone with Yuu or even bring his lewd magazines with him in Guren's apartment. But sake and other alcohol was still allowed. Just not to Yuu.

Mito was too strict in Yuu's opinion. She always forced him to clean up his messy room and do his homework. And Yuu learned that it was no good to make fun of her crush on Guren. She didn't hold back her strenght even though he is younger than her by five years. Her hits hurt. That was a fact.

Shigure wasn't that bad but Yuu didn't know how to talk with her. There was always the awkward silence between them that was slowly killing him. It wasn't like Yuu didn't like silence. But he was a noisy kid, he had to admit it. So the hours spent with her were boring and awkward.

Then there is Sayuri. She is nice and sweet to him. But her obvious crush on Guren was quite annoying. She blushed everytime Yuu said something about Guren or when she touched something that belonged to Guren. Last time she fainted after accidently touching one of Guren's underwear that Yuu left in the hallway. Yes, purposely. He was curious what would happen. Though he didn't expect her to faint because of that. Guren was rather annoyed when he found out what happened.

But back to the current situation.

Guren motioned for Yuu to go open the front door, making him groan in annoyance and walk to the door that was almost twice of his size.

Just as h opened the door a mass of silver and blue glomped him, making him lose his balance and fall on the floor.

"Hello, Yuu!~ Guren~ I came to take care of your baby brother.~" Shinya giggled while suffocating Yuu who blamed his hit head for seeing the stars and blooming flowers behind Shinya. 'I am NOT a baby!' he exclaimed in his mind but his lips were as if frozen to say anything.

"Good, you are finally here." Guren stood up from his seat and walked to them, but of course not to help his little bro. He grabbed his wallet and keys, ready to leave.

"H-hey Guren!" Yuu shouted from under the older male.

"Have a safe trip, Guren.~" Shinya waved at his childhood friend, a gentle smile plastered on his handsome face.

"Tch. Don't blow up my apartment. I want to see it in one piece just as I left it." the door closed after him as he left the black haired boy and 21-years old silver haired male on the floor.

Shinya's smile faltered for a second, something that Yuu managed to notice after knowing each other for years.

'Why everyone have a crush on the stupid Guren?' Yuu's anger came back at the thought and he tried to push off the taller male. He know that Shinya had a crush on Guren for years but he didn't say anything. He even fought against his family to cancel the forced marriage between him and Mahiru, knowing how Guren loved her and that they were secretly in a relationship. He hid his hurt heart, his sadness behind a mask.

Maybe Yuu was a bit stupid but he was sharp. He saw many people with the mask, hiding their emotions. His best friend Mika, wore it many times and Yuu wasn't oblivious to it.

Shinya chuckled and stood up, pulling the green eyed male up but not leting him go.

"Fierce as always." he commented while Yuu was trashing in his arms with a light blush on his 'baby face' as Shinya loved to call it. Of course that not making Yuu happy.

"Let me go, Shinya." Yuu put his smaller hands on Shinya's chest, an attempt to get rid off the clingy male.

"Aww, no need to be shy. Even after what happened last week..." he trailed off and Yuu's blush got stronger, remembering what happened. "You were so clingy that time. It was so cute." Shinya cooed, enjoying the embarrassed look that crossed on Yuu's face.

'That time' was when he came home with teary and guilt filled eyes. He got in a fight with Mika, argumenting with him over a silly thing. Again.

He hoped that no one would be at home but instead of an empty apartment, a worried Shinya welcomed him. He didn't ask the sad boy anything and only hugged him, whispering comforting words to him. It was the first time that Yuu felt so comfortable warm in someone's arms. He never got a hug from his parents or Guren. Only from Mika, his childhood best friend.

So this was a nice experience for the young boy who never felt loved enough. Shinya so similiar to him. Never being loved by his adopted family and having an unrequited love, always hiding his emotions behind lies and gentle smiles. The only person who saw behind his mask was Yuu. His mask often breaking up in front of the understanding raven haired male.

These moments making their bond stronger, not many people knowing about how close the two are, mostly when they are alone.

Mito, Goshi, Shigure and Sayuri often saw the duo to team up against Guren just to annoy him. But that's all. They didn't see how Yuu comforted and supported Shinya when they saw Guren and Mahiru making out right in front of them. Or when Shinya was taking care of Yuu's wounds after the trouble maker got in another fight. Shinya lived alone and near Guren's apartment so it often happened that they visited each other when they were lonely or needed a company.

Yuu was more lonely in the past years because all of his friends were already in a relationship and Mika was getting more popular in his school, their time together being often cut off because of school or because of Mika's club activities. The school was stressful for both of them. Yet, Yuu just smiled at Mika and said that everything is okay. Lies, lies.

Shinya had to watch Mahiru and Guren being all lovely-dovely in school and quietly envy them. Not showing his jealousness even as he teased them and said that he supported their relationship. Hearing his adopted family bad-mouth him and still tell his little sister Shinoa that everything is okay. Lies, lies.

"W-whatever." Yuu turned away, not fighting anymore and just waiting for Shinya to release him. Just then he noticed the small bag behind Shinya. So he was really going to spend the weekend here...with him...and alone.

"Let's enjoy our time together, ne~?" Shinya smiled playfully and pulled Yuu deeper in the apartment.