I Found Out My Department Head's Secret

The department manager—always authoritarian and old-fashioned—is caught by one of his female employees leaving a motel with the CEO’s wife.

The next day, the employee confronts him in private with proof of the illicit affair and makes it clear she could tell the CEO at any time.

From then on, he starts treading carefully around his subordinate: at the office he’s still her superior, but outside of work he ends up meeting her demands like a personal assistant. What begins as simple revenge grows increasingly extreme, until he ultimately gives in completely to her control.