Nami begins to feel uneasy because her husband is busy with work and they can't even have a conversation, let alone have sex at night. Her father-in-law comforts her and she regains her energy, but then he starts acting strangely... One day, when they are alone as usual, her father-in-law asks her to wash his back while he is taking a bath. However, as her clothes gradually get wet, her nipples start to stand out, and his eyes are glued to her...