Breaking Point (Miya Atsumu Fanfiction)

Her older brother had asked his friends a small favor before leaving for university, to look after his younger sister at school and take care of her. But who would've known what story was going to unfold because on his small request.

Miya Atsumu and Osamu grew up with her brother and her, being close with her brother. But she was usually around, sometimes even playing with them. She was friends with them, but never as close as her elder brother was, they were best of friends after all.

But as the Miya twins enter into their second year of high school, their best friend was off to university, and he had asked one thing of them. Watch over his little sister. It was seemingly an easy task, for anyone it would be easy. But for Miya Atsumu, this wasn't going to be easy.

As Miya Atsumu grew older, he found himself starting to develop feeling for her, and now that he was tasked with watching over her, he didn't know how long he'd be able to last. He needed to keep his cool, it was his best friend's little sister.

Suzuki Sayuri, had always been a kind girl, who was driven to reach her goals. She spent hours everyday, just writing random stories or reading. She loved writing down her ideas, and reading. Despite being kind, she had only a few friends, and didn't get along with some of her peers. But she tried to never let those close to her find out.

She was always there for the twins and her brother, showing up to every single one of their games to cheer them on. If they wanted to practice, she'd help them, even if she wasn't good at volleyball. And if she wanted help picking out a new book, they'd help her. She spent time with them all the time, and she thought that their friendship wouldn't be effected by her brother leaving.

Now, there was nothing in the way from Miya Atsumu making his move, other than his own willpower. But how long would he last before hitting his breaking point?

Disclaimer: I don't own Haikyuu and its characters!