OCHIKOBORE SHOUGAKUSEI, ISEKAI & GENDAI DE SAIKYOU YUUSHA TO NARU

Akito Toba is a dropout elementary school student who can't do anything better than other people, including sports and studies. One day, due to his own carelessness, his beloved little sister is in danger of death... At the moment he despairs at his own incompetence, the goddess who designs humanity appears, and Akito is transported to another world--!? "I will become strong in the other world. And I will save my precious family!" The classic adventure fantasy begins, in which a talentless boy works hard to become the strongest in the world!