Yuka, a married woman left unfulfilled by her husband's constant business trips, struggles with mounting loneliness. Reaching her limit, she turns to masturbation for release. Her son notices her distress and resolves to ease her loneliness, even if just a little. Choosing to embrace his mother in place of her absent husband, he draws her into his arms. Hesitant at first, Yuka eventually yields to her son's affection. The pleasure she experiences becomes intensely addictive, drawing her deeper into desire until she finds herself utterly dependent on her son's touch.