I had been working hard to get back at my boss Yoshino, whom I hated, and I was finally promoted to a star department, but then my wife and colleague Rio was transferred to work under Yoshino. At first, I was a little worried about Rio working under Yoshino, but I didn't pay it much attention. One day, the company made it mandatory to keep a work diary, and as a manager, I started checking Rio's diary. Then, I noticed a clear difference between her working hours and the tasks she performed, and I began to feel something was off. Feeling uneasy, I went to check on her during overtime...