Miyu-san, who has been married for six months. At first, she enjoyed happy days with her husband, but gradually she began to feel lonely and anxious. Her husband is busy with work, comes home late, and their conversations decrease, and in the midst of her monotonous daily life, she felt emptiness. One day, she suddenly runs into her ex-boyfriend in town. Remembering her student days, she remembers nostalgia and her youth, and the distance between the two quickly closes, and she makes a mistake just once... In the midst of growing dissatisfaction with her husband, the time spent with her ex-boyfriend is very reassuring, she feels happiness as a woman, and her desire for an affair is ignited...
