Nagi who was summoned to another world acquired the「Skill Structure」skill. Nagi felt the hints of black job from the king’s request 「To defeat the devil king」. He leaves the castle and starts his journey with a slave girl. The small demon girl Cecyl, the melee-fighter beast girl Rita , Aine the onee-chan maid, Regii the cursed sword. Rafiria the warm and fluffy elf and Iris the sea dragon shrine maiden. Nagi rewrites the girls’ skills and made them into 「cheat characters」one after another.