Killed Again, Mr. Detective.

Sakuya Otsuki, the son of a famous detective, dreams of living up to his father's legacy with the help of his assistant, Lilithea. But there's one unusual twist-wherever Sakuya goes, he keeps ending up as the murder victim in his own cases. When he's sent to investigate a crime on a luxury cruise ship, he's killed yet again. Each time he wakes up, Lilithea is waiting to assist him in unraveling the truth behind the mystery.