The 22nd generation (tentative) of the Sekai family - Sumimura Ryoji has been training as a Sekai under his grandfather's strict guidance since he was young. Although he shows great potential, he personally detests this monotonous practice. Until one day, when Toki音 from the Yuki村 family, also a Sekai, saves Ryoji during an exorcism but ends up severely injured! Stimulated by this incident, Ryoji resolves to become stronger. And so, five years have passed... Now, an unprecedented and unparalleled super Sekai battle story begins!!