Married for five years. Her husband is obsessed with his work, and his relationship with his stepchild, Kazuyuki, is also complicated. His wife, Maika, is tormented by her boring daily life. However, due to an unexpected turn of events, she begins an affair with Kazuyuki's friend, Kenji, and begins to feel more feminine. Maika's secret affair with the young man, whose age difference is as great as that of a father and son, becomes a daily source of pleasure for her. One day, Maika notices Kazuyuki looking like he wants to say something, and so she decides to visit his room...