Tenma Otori died. But his story doesn't end there! A god from another world appears before him with an offer Tenma can't refuse: if he agrees to be reincarnated to save the god's dying world, he'll be bestowed cheat abilities. Who can say no to that?

Tenma is reincarnated into a lush fantasy world filled with demi-humans, monsters, mysterious forests, even magical spells and items. He's adopted by two former master adventurers, while his new grandfather is a famous wizard. As Tenma grows older, his adoptive family discover more and more of Tenma's extraordinary gods-given powers and abilities.

But even if Tenma wants to lead an ordinary existence, fate is not so kind. He has to contend with three mysterious strangers who try to kidnap him. And when tragedy strikes, Tenma has no choice but to leave his new home behind and set out into the world...