Follows a boy who has lost all hope in life and encounters a group of “Showa Ghost Yankees” with unique personalities.
The bloodlines of "Oni" and "Momotaro" have been passed down among certain humans for generations. Long ago, the Oni, aware of their own ferocity, lived in seclusion. However, their peace was shattered by an invasion led by Momotaro. Over thousands of years, these two factions formed the "Momotaro Agency" and the "Oni Agency," respectively, and have been locked in conflict ever since. The protagonist, Shiki Ichinose, suddenly learns of his Oni lineage following an unexpected attack by Momotaro. This revelation sets Shiki on a path to discover the destiny that lies within his blood — a meeting with the Oni dwelling within him.
Asakura, a high school student at the bottom of the school caste, was appointed as a member of the school festival executive committee. He plans to go out with Ito Mayumi, a beautiful girl who ranks high in the caste, with the aim of collapsing the caste. The caste collapse plan seemed to be going well, but in the wake of a certain incident, it went in a surprising direction ..!?? The tragicomedy of a strange class collapse begins.