I am legion

Junichiro Amamiya is a college graduate who committed suicide by jumping off a highrise building. Upon dying, he realizes that he has been reborn, not in a world of swords and magic, but in his own body. He has traveled back in time. He plans to live his new life to the fullest, but soon realizes just how dark the world really is. He murders his father, and is thrust into a world of the supernatural. From exorcising ghosts to fighting demons, Junichiro sees it all.