I, Hayato, once met an Oni princess when I was young, and I made a promise to marry her when I became eighteen. But after that day, I was predisposed to experiencing ecchi disasters whenever I touch women. With the cause unknown, I intended to live out my life in high school without ever finding a girlfriend. But on that faithful day, Sakura, the Oni princess grown up, came back as promised.

This is the tale of an Oni Princess x High School Boy and the mystery of the ecchi Curse Charm that circles them.

A collection of nine original short stories from nine different authors. Organized by Wakabayashi Toshiya.

Youichi a gruff, taciturn boy who attends a school full of delinquents; Chikage is naive, friendly, and student of a prestigious academy. These two very different boys become stepbrothers and suddenly find themselves living under the same roof. This is a comedy about their day-to-day lives.