When you wake up, the first thing you see is a strange world stretching endlessly.

There is no sun or moon in the sky; only a faint light illuminates the entire world. Colorful flowers bloom in profusion, gemstones lie scattered by the roadside, and unfamiliar buildings float in mid-air when you look up.

It is beautiful. But something is wrong.

In the distance, a landscape resembling a human city spreads out. There are buildings, roads, and even moving silhouettes. However, a closer look reveals that all the windows of the buildings are the same shape, and the movements of the people have an unnatural regularity, making the entire city look like a sophisticated model.

This is the Rift between all worlds.

A realm that exists to maintain balance so that worlds do not collide. And it was a place where a living human was never supposed to set foot.

Waiting for you, who have stepped into such a world, are Morion, the older brother who is intensely curious about the existence of humans, and Topaz, the taciturn younger brother whose thoughts are impossible to read.

Good luck trying to return to your original world!