Fake: a Kagehina yandere au

Hinata seems incredibly innocent and sweet. He puts everyone at ease with his smile. But when it comes to his best friend, kageyama, a different side of him comes out.
A side nobody knew he had. Not even his family.
A side that would kill for kageyama. Anyone that looked at him for too long was on his list. People beware. The ray of sunshine is fake. He's a killer in cold blood. Get too close, and well, you'll see what happens.