Having passed the midpoint of her life, married woman Kimika harbored a deeply hidden, deviant desire. One day, her ordinary life takes a drastic turn with the sudden appearance of a door-to-door saleswoman selling corrective underwear. At the woman's urging, Kimika tries on the garment and is immediately struck by a familiar sensation as the snug pressure wraps around her body. The constriction awakens long-buried memories, stirring her consciousness and igniting a rising lust that soon erupts into overwhelming, lewd impulses. Through the garment, she channels her secret longing to be bound—gradually becoming addicted to the sensation of tight restraint. This mature wife's transformation unfolds, marking the beginning of a new, obsessive daily ritual.