Wife Natsumi (34 years old). In her second year of marriage, she and her husband are both working professionals. They were coworkers at the same company, married after a six-month relationship, and had a child a year later, living happily as a family. However, suspicions of her husband's infidelity have caused a rift in their marriage. Though they appear harmonious on the surface, their relationship has grown distant. Troubled and wanting to get back at her husband, Natsumi plans a one-night, two-day trip with a man she just met. Despite feelings of guilt, she resolves to betray the husband she loves. This story deeply portrays the allure of a married woman and the emotional turmoil within her marriage.