One night, a black and a white light from space approach the Japanese archipelago and land on a very ordinary house in Kasukabe City. As usual, Shin-chan, who is looking forward to the dinner, is hit by the white light, and incredible power surges in his body.

“My Butt... Butt is so hot...!?"

Shin-chan gives his body to the strength, and after concentrating on his butt, the toy begins to float in the air.

"This, it's really amazing..." On the other side, a man is illuminated by the black light and starts to wreak havoc after gaining superpowers. He wants to destroy the world.

Destruction, chaos, screams, at this moment when the whole Japan is dominated by fear, Shin-chan stands up and fights!