Asuka Nita and Eiichi Hakozaki are an established couple who belong to a swimming club together.
Eiichi, who has a strong physical and sexual appetite, can't stop getting horny and asks Asuka to have sex in her swimsuit before the club even starts.
Asuka: "What if someone already walks in here?"
Eiichi: "They won't know if we go into the shower room and close the curtains."
Asuka - "Oh no... there's nothing we can do."