Bonjin Tensei no Doryoku Muso Akachan no Koro Kara Doryoku Shitetara Itsunomanika Nippon no Mirai o Seotte Mashita

Itsuki is a boy who was killed by a random slasher and reincarnated.

He is reborn into a version of Japan where man-eating monsters known as "Ma" exist—and worse, he is born into a clan of Exorcists who use magic to exterminate them!

Children of Exorcists are prime targets for the Ma, and the weak are quickly killed off. So, Itsuki makes a vow: "I will become strong—so that I never die again."

Aiming to be the strongest, he relentlessly practices magic from the time he is an infant... until one day, he realizes something.

"Crap... I worked too hard..."

Despite being just an ordinary guy at heart, his excessive effort has turned him into the strongest being alive!? With off-the-charts power that crushes every demon in his path, this "Unrivaled by Hard Work" fantasy begins now!