Help finding manga

So I’m looking for this manga I read a while back I forgot the name and if anyone knows I’d appreciate if you could tell me. It’s a psychological manga about a boy on the baseball team who likes this girl and their in like middle school and a teacher was doing things to the girl and the boy witnessed him doing it and murdered him with his baseball bat walking back to his class covered in blood and now in high school After he got released from jail everybody is afraid of him but the girl. It’s a long kinda summary I know but I really and dying to find it and I hope this kinda helps thanks