Miki constantly exposes her lewd body while doing housework, fully aware that her son Mikio is watching her with lustful eyes. Mikio stares intently at Miki's figure, completely fascinated. Miki teases him knowingly, saying, "Mikio, you're looking at my body with those dirty eyes again..." deliberately flaunting herself. Mikio's heart races as he watches her climb a ladder to change a lightbulb, his eyes glued to her hips. Overcome with excitement, he loses his balance and knocks over the ladder, causing both of them to tumble to the floor. In the fall, Mikio's hand lands on Miki's breast. Startled, he comes to his senses—but Miki, aroused by the touch, feels her desire intensify and gives in to her passion. This ordinary moment marks the beginning of a forbidden transformation in their mother-son relationship.