Onibushichou is a rural town in a basin surrounded by mountains close to the Sea of Japan. Further from there, you will find the more rural village of Koubou

Today, April 6, 2023, is the day of the entrance ceremony for Koubou's only school Keijo Academy High School. This school celebrates its 10th Anniversary without anyone knowing why it was opened in this underpopulated area. And a new student arrives named En Ayakari.

"Go back to Koubou"

Having moved from the city according to his mother's dying will, where he has memories of living as a child. He had no meaning or significance to come back now, but new and familiar encounters drag him into the "Seven Wonders of the Academy" selection swamp. Keijou Academy High School's Seven Wonders of the Academy did not yet exist.

A strange bond is formed in the land where demons lie. This is a story woven by people and mountain demons (Sudama)

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