Double anal sisters The older sister thrusts her fist into her sister's anus.

The Hikaru and the Hina sisters are taken in by their uncle Takimoto after their parents passed away. Takimoto's perverted nature gradually becomes apparent, and the obscene training is administered. The two are ultimately told they will only take in one of the sisters. Hikaru suggests to Hina, "Runs out of here and live alone, even if they're poor."