After losing her husband, Izumi lived an ordinary, peaceful life with Takashi. However, upon seeing an old object in Takashi's room, she recalls the image of a man she had nearly forgotten, and begins indulging in masturbation. Her desire for pleasure grows stronger each day, eventually leading her to use dating sites. The story depicts how the gentleness of daily life collapses in an instant, consumed by desire. Izumi's psychological transformation feels authentic and evokes strong empathy from viewers.