Kazuma had a dream one night in his mansion. In this dream, he was in space, piloting a mech suit. With him were at least a good eighty other people, piloting mechs, fighter jets, warships, etc. None of his other party members were around, at least from what he could see. As the pilots all stood there, a ship approached them. A trap door opened, unleashing a swarm of alien bugs. The pilots all rushed after them, slaughtering as many bugs as they could. But Kazuma could not move. Suddenly, a dark figure approached him from behind. Before Kazuma had the chance to turn around to see what it was, his mech was blown up with him inside.
The dream awoke Kazuma in the middle of the night, only to find that the mansion was burning. Someone had set it on fire, and was fleeing the scene as this was happening. Kazuma tried to find a way to get out, but all of the exits were sealed shut, so Kazuma could do little but sit there and await death.
As he sat down on a certain chair that was becoming a little too familiar, Eris decided that he would get sent back to Japan. So Kazuma awaited his arrival at his new-new life... except the Japan he was about to get was a little different than the Japan he expected...
Ladies and gentlemen, fairies and goblins, Venusians and Martians... Kazuma Satou is entering... the twenty-second century.