The forbidden physical relationship between a brother and sister connected by blood. In an unknown hot spring inn, the brother and sister are alone together. The brother, who usually has unprotected sex with his sister, decides to train her for anal sex to avoid pregnancy. Although reluctant, the obedient sister accepts anal sex for her beloved brother. The shaved sister, whose vagina and anus have been developed by her brother, goes on a one-night, two-day incestuous hot spring trip.
※There are no performers under 18 years old in this work.
