Kazuma killed his sisters teacher after he found out that the teacher raped his sister. His sister took her own life after being assaulted. He also realises by killing the teacher he messed up his family, her teachers family, what ppl thinks of him and also sent to jail. Feeling guilty he tries to kill himself many times until he meets the teachers daughter. This manga is a banger and unique so far. The art style is amazing. I enjoyed reading the few released chapters so far. the characters reacted in realistic way here. Some people will enjoy this, as it is dark