Wife Misaki is 28 years old, married for five years, with no children. She works as a nursery school teacher, waking up at 5 a.m. every day, while her husband works night shifts, resulting in a completely reversed daily rhythm. Her innocent, childlike personality makes her giggle shyly during sex, which has caused them to go three years without intimacy. Troubled by her lack of sensuality and eager to learn how to please her husband, she embarks on a two-day, one-night trip with a mature, experienced man. Discovering her own hidden desires, she hesitantly begins to act boldly, craving new and intense experiences.