Once upon a time, there was a hero who protected the Earth from a great crisis... And now, in the face of another crisis, a new hero is born from Binan High School's "Earth Defense Club"! ...Huh? Who were those former heroes? Well, it was "those guys", "those guys". ...Huh? Why are you blurring out the names? It's a multi-verse setting, so mumble mumble... (vague)　 Anyway, the new defense department - Unzen Shinkuro, Sukayu Narushi, Unohana Sousuke, Oshamanbe Ushio and Aso Akuta.