The protagonist, Seiichi Makita, suddenly finds himself lost in an unknown world—a mysterious place free from all the injustices of ordinary life. Humans, animals, and plants alike are free to live as they wish in this seemingly ideal world.

Having lost most of his memories, Seiichi sets out in search of a way back to his own world alongside Yuki, a cat-eared girl he meets there. As their journey continues, fragments of his lost memories gradually begin to return. And beyond them lies a truth Seiichi could never have imagined...

Includes Japanese voice acting.