Devil's High School: Ise Returns to His Roots

An unexpected contact led Hyoudou Issei into a strange world called "The Root", where he successfully obtained most of the inheritance of the two legendary heroes... After returning from the origin, Hyoudou Issei tried his best to change his own destiny, but at the same time he had to return to the original trajectory... Aisha, Rias, Akeno... And the legendary daughter of the Human Emperor... So, what kind of legend will be born?