Despite it's synopsis, the stories centers around the normal, imaginative but kind third-year student Ryuusei Amano and his girlfriend Lunamaria Aim(Human alias, Matsuri Tsukihi) encountering several supernatural creatures and sacred gear-users in their mundane, everyday lives. Best friends with Issei Hyoudou, Ryuusei believes himself to be the descendant of the extinct clan Vortigern of Dragon-tamers, and with such mentality plus his own chuunibyou knowledge, Ryuusei will try to rise from the ashes of his unexistent clan, all while attracting the love of several supernatural girls.