The High King Dragon Z-ARC brought about the end of the world. Reo speaks about the day the world was split into four. Once, a girl named Rei stood against Z-ARC in Reo's place and he says that her feelings are in Reira, but Reiji recognizes it as a scheme his mother, Himika, told him about. When he sees the overwhelming rage Reiji feels over the tragedy, Reo asks for Reiji's help with Revival Zero...
If what you're saying is the truth...