An official spin-off doujinshi to the "Oniichan wa Oshimai!" / "Oniichan's End" series. Features the crossdressing story of Minato-kun, a boy that appears in the Onimai series.
Having been feminized by a suspicious drug given by his little sister, what fate will Oniichan face...!? (The manga parts of RJ247862, RJ273796, and RJ296502, bundled together!)
"I have no qualms about becoming a creature preying on human souls if I could take vendetta." said a girl. "I want you to be happy without hatred for others." replied a boy.