Eriko, who married a man with stepchildren and suddenly became the mother of three brothers at age 45. Their appearances and personalities were all different... Eriko was struggling with how to interact with her sons. One day... she accidentally found out that the three brothers were 'virgins'. Eriko loves virgin penises so much that she immediately took action. "As a mother, I'll give them an unforgettable first experience." With this mission in mind, Eriko visited the room of her second son, Tomoki...
