Incest x sleep rape x pure love! The first animated version of the original brother-sister comic The older brother, Akira, and the younger sister, Yui, were living in a single-parent household because their parents divorced. Akira, a straight-laced and serious man, takes care of Yui as a substitute father. It's here. One morning, Akira hears from Yui that her male student confessed to him. Akira can't hide his shock at seeing the only side of him that he doesn't know. The image of Yui, a cryworm and a spoiled child, was always in Aki's mind. He always thought it was his role to stay with her and take care of his sister. And the time will come when Yui, who has grown up, will leave me.