Hirose Yuu, a novice C-class exorcist, is suddenly summoned to another world. There, along with other girls summoned from different worlds, he becomes a Paladin and successfully defeats the evil god who governs death after three years. They safely return to their original world, only to realize that barely a minute has passed since the summoning. However, his childhood friend and partner, Aikawa Kumiko, sees through Yuu's changes...! For Yuu, who has been active as a Paladin in the other world, ordinary evil spirits are no longer worth fearing. Keep an eye on Yuu, who has become the strongest exorcist!