Mr. and Mrs. Hirose met as co-workers and have been married for three years. - Her husband, Yugo, has a decent income, and they are living a smooth life. - ...However, lately, even when Yugo invites her to a night out, Riona refuses, giving a reason. - Yugo begins to feel a sense of dissonance, and even though he feels sorry for her, he requests an investigation into Riona's daily life. - A few days later, the memory card she received from the man at the insurance office showed a picture of Riona being trained by her husband...