Ji-seong who only cares about success is briefly a fitting model at the recommendation of his former college senior, and he uses his senior's wife to fulfill his desires.
The wife, I think, is the rich one and owns the company where her cheating husband is the manager. Her husband tasks an employee of theirs to seduce and fuck her so that he can film it and use it as evidence for their future divorce settlement, and maybe since she committed adultery, he can get her entire company. However, the employee tells his wife about his plans. So, the wife confronts her husband and then fucks the employee at her own discretion (44:18). She then leaves her husband and marries the employee, and in the end, it is revealed that the employee masterminded it all.