Yumiko, a mother who has raised her son with just one woman. The son who touched the body to give such a mother a massage once in a while suddenly stimulates Yumiko's no bra nipple. At home, she was always a braless Yumiko, but she overreacted with a jerk in spite of an unexpected event. The son who saw such a mother adds further stimulation to make him feel more comfortable. And that night, Yumiko comforts her body, which had become sensitive due to the drought, and goes to work the next day with no bra.