Oliver's Substitute Bride (Oliver and Jessica)

Because of a conspiracy, Jessica was forced to marry Oliver, who was in a wheelchair, instead of his sister. He was overbearing, paranoid, and rich, but he was said to be suffering from a hidden disease, being impotent.
But who was the vigorous and handsome man that night? At first, it was agreed that they would be with each other for a year, and when the time was up, they should break up and stop entangling each other. However, the man said then, "Since the game has started, only I can decide when it will end." The woman was furious and shouted, "You are a monster and pervert."
She couldn't escape, so she begged, "I'm just a temporary substitute. Let me go, please." He hugged her and said, "You'd better behave yourself."