Housewife Fumie (35 years old). Ten years into her marriage, no children. She had been living a sincere and stable married life with her serious and dependable husband, both of them caring deeply for each other. However, one day, she embarked on a one-night, two-day trip with a man who was not her husband. The reason? Jealousy and admiration toward another woman. Despite maintaining a loving, romantic relationship with her husband even after marriage, she—someone who until yesterday cherished her life as a wife—now chose to betray him. Telling her husband she was traveling with friends, she faced no suspicion from him, yet deep inside, the thought of her husband unknowingly trusting her lies brought her pain. Still, she set off on this journey with another man. The reason behind it—and the hidden desires buried deep within her heart—began to surface.