The father-in- Kokoro is flustered by the unprotected panty shots of his son's wife, who lives under the same roof as him. Seeing the father-in-law's cock, which is rock hard despite his age, the wife, who is frustrated with her sex life with her son, can't suppress her sexual desire and approaches her father-in-law. Although it is a relationship where they should never touch each other, the father-in-law and daughter-in-law sneak away from their son and wife in the kitchen, bathroom, and living room to seek each other's bodies.