Makai de Sodaterareta Shounen, Umarete Hajimete no Ningenkai de Musousuru ~Makai no Joushiki de Ikitetara, Kizukeba Jinrui Saikyou ni Natteita~

Summary

Edel was picked up and trained by the Great Sage Ramirez in the Demon Realm. Before he knew it, he had grown strong enough to survive that harsh world all on his own.Upon turning twelve, Edel decides to live in the human world. There, he meets Maribel, the headmaster of a Hero Academy, and begins his life as a student. However, it seems the "common sense" of the Demon Realm is completely off the charts compared to the human world...!?"I just did it normally, though." "That is NOT normal!!"Everyone can’t help but play the "straight man" to Edel as he displays his outrageous abilities. The story of a boy beyond all common sense begins his new life in the human world!Originally from "Shousetsuka ni Narou"! An other-world fantasy where a boy born and raised in the Demon Realm freely enjoys the human world to his heart's content!