Due to postpartum physical changes, Riho suffers from hyperhidrosis and has become more sensitive than when she was single. While riding her bicycle back to her home after dropping off her child at daycare, she comes into contact with a pedestrian. She immediately apologizes, but her partner, Nakano, does not forgive her, and he stares at her sweaty chest and asks her to show him his sincerity, so he makes her show him around her house. Having caught her weakness, Riho allows her body to do what Nakano tells her to do, and his nipples are carefully played with, and during sex with her husband, she feels a sense of release and pleasure that she has never felt before...