Yumiko is a single mother who has raised her son. Thinking of her, her son decides to give her a massage, but accidentally touches her braless nipples. Yumiko always goes braless at home, but she overreacts to the unexpected event and flinches... Seeing his mother like that, her son adds more stimulation to make her feel even better. That night, Yumiko comforts her body, which has become sensitive due to lack of sex, and the next day she goes to work without a bra...