War rages on the lands of Ente Isla as the Demon Lord, Satan himself plans to eradicate all human life forms and establish his own form of tyrannical order, or at least that is what I understand when they show shots of Demon Lords in positions like these.

When all hope looked lost and seemed like there was no one brave enough to put a halt to the Demon Lord’s action, a brave hero from a land far far away rises, the hero riles up the human forces pushes Satan to a corner, does a one v one with Satan and totally floors him.

After admitting defeat Satan gives his whole epic but not so epic “I will be back, watch your back, back to back” speeches and opens a portal to some world which I assume even Satan didn’t know which world the portal was about to take him. I say that because Satan and Alsiel then find themselves looking like Kirito and Default Side Character in very human-like bodies, and near a dirty alley in modern Japan.