In this adult incest role-play, Ririko Kinoshita is a busy mother who has raised both her biological children and adopted sons with equal devotion. She now supports a household of seven adult sons, sharing an intensely intimate daily life with them under one roof. One day her former husband arrives with his adult son Shiro. Seeing the loneliness in his face awakens Ririko's maternal compassion, and she welcomes him into the family's forbidden sexual bond, bringing the number of beloved sons to eight.