After giving birth, Riho's sweat glands became more sensitive due to her postpartum physique change. While cycling home after dropping off her child at daycare, she accidentally bumps into a pedestrian named Nakano. Although she apologizes immediately, Nakano doesn't accept it and starts staring at her sweaty cleavage. Feeling pressured, Riho reluctantly agrees to let him see her body properly. As he teases her nipples, she experiences an unparalleled sense of release and pleasure that even her husband couldn't give her during their intimate moments...