Saihate ni Madou

Kazuma Waku, who killed the man who drove his sister Yuri to suicide, has been released from prison after serving seven years. Even after all this time, the moment when he killed a man still haunts his mind. He also remembers the sight of the man's daughter, who witnessed the whole thing. Tormented by overwhelming guilt, Kazuma decides that he will atone for his crime with his own death. Kazuma and his mother, who came to pick him up at the prison, head for Yuri's grave, where they see a familiar-looking girl... This is the start of a suspenseful human drama, depicting the strange fate between a murderer and his victim's daughter.

(Source: Heros Web, translated)