Purpose of Swapping (2024)

Do-cheol is getting bored of his relationship with his girlfriend, Soo-ji. One day, he goes to the house of his close senior, Min-jae, who owns an izakaya (Japanese bar). He meets Min-jae’s younger sister, Hye-jin, and falls in love with her at first sight. For Do-cheol to be able to covet his senior’s younger sister, he let his girlfriend have sex with Min-jae in exchange.