START-111 The 8 hours between dropping off the kids at daycare and picking them up... A virile mama-chari wife having an affair with her eldest son's soccer club coach. Rei Kamiki

Rei, a mother of two, has not had sex with her husband since having her children, and is secretly attracted to the coach of the soccer club her eldest son belongs to. One day, while taking her children to nursery school, she is in trouble when the chain on her bicycle comes off, and is helped by the coach who happens to be passing by. After that, she invites the coach to her home and has a sexual relationship with him.