The Hirose couple, who met as colleagues at the company and have been married for three years. Her husband, Yugo, has a decent income, and they are living a smooth life. ... But recently, Riona refuses Yugo's invitations to nightly acts, making excuses. Yugo, who has begun to feel discord, feels sorry but commissions a detective agency to investigate Riona's daily life. A few days later, on the memory card received from the detective agency's man, Riona's figure being trained by another man in a pathetic state was recorded...