Eun Mi and her husband have been married for 5 years, but they rarely have sex. Eun Mi goes through her SNS one late night and finds a post about 'invitation girls'. After thinking about it for a few days, she signs up for it and gets invited by Hyun Ji and her husband for a new and stimulating experience. Eun Mi shared her experience with her husband and 'swaps' with Hyun Ji and her husband... (Source: HanCinema)