Naomi Nishina's husband is consumed by his carpentry work and pays her little attention. Though she has grown accustomed to his indifference, Naomi's loneliness intensifies each day, pushing her toward her breaking point. One day, seeing her son working in the yard, she finds herself irresistibly drawn to his masculine physique and loses all self-control. She attacks him passionately; though he resists at first, he understands his mother's loneliness and frustration. Softening, he gently embraces her. To comfort her and satisfy their mutual desires, he gradually becomes more proactive in caressing her body, and their relationship evolves into something entirely new.