A boy who doesn't know his parents is living in an orphanage and is 11 years old Ren Maushirou who can't remember his past all he knows is that he killed a person but he keeps it a secret. is very friendly and is friends with almost everyone at the orphanage. One day he gets the news that he is being adopted by a very rich family. On his last day he is taking a walk he sees a man physically assaulting a women He feels arger one which he has never felt before but feels very familiar with it He grabs a broken wine bottle from the side and pounces on the man.

After a not fierce battle the old creep falls unconscious and upon closer inspection Sen saw that the woman was actually a gid not much older than him, pink hai, pink eyes and a beautiful face but Ren couldn't care less. He asked her "you okay "to which the girt replied "yeah"While talking the old man sneaks up on him and jumps on him after a furious dog chase, Ren blinded by his anger accidentally kills the man, before he realizes anything his head starts to ache and while screaming falls unconscious. He wakes up in an unfamiliar place. He hears a husky and growing voice saying help you find all your memories but in return do my bidding"