Hiroji is still passionately in love with his wife, chisato, but recently he has been struggling with erectile dysfunction and is worried about being abandoned by her. Desperate to keep chisato, hiroji decides to use an aphrodisiac. However, while hiroji is away, chisato and their son accidentally drink the aphrodisiac-laced beverage. Their bodies quickly heat up, and they find themselves drawn into a forbidden relationship.
