The Unrivaled Result of an Ordinary Person Overpowered Through Effort -I Trained Since I Was a Baby and Before I Knew It, I Was Carrying the Future of Japan-

Itsuki, a boy who was murdered by a random street attacker, is reincarnated. He finds himself in a Japan where man-eating monsters known as 'demon devourers' exist. And to top it off, he's been born into a family of exorcists who use magic to exterminate these monsters! The children of exorcists are prime targets for Demons. If he's weak, he will die again. So Itsuki makes the decision to become strong so he never...