Fifty-year-old housewife Yuri, exhausted from her daily chores, finishes bringing in the laundry and succumbs to drowsiness, falling into a light nap. Her son Toshio, noticing her vulnerable state, quietly begins touching her body without waking her, while stimulating himself. As he observes Yuri's unconscious reactions, Toshio grows increasingly aroused, drawing them both into a deeper, forbidden connection. Hidden emotions begin to stir within the quiet moments of their everyday lives, awakening an illicit desire between mother and son.