One day, Jeong Eun (Kwak Ji Min) shows up in front of jobless youth Gi Seok (Kim Min Joon) who’s only specification is his family register. She abruptly asks him about his the marriage with her twin sister So Eun (Kwak Ji Min). Gi Seok looks at her absurdly as they smile awkwardly at each other then he finally remembers the marriage he had with some girl a few years ago, lending her his specifications.
Marriage with the sister and dating with the other?
A cheeky marriage mission starts where they have to prove they are a married couple.
For her sister who is in ‘false marriage’ captivity, Jeong Eun has to half-forcefully convince Gi Seok and pretend she was her sister and his wife but the evidence isn’t enough. Just them, Jeong Eun recommends taking a video as if they were a loving couple. Gi Seok also idly agreed to it thinking about getting it over with since she was his sister-in-law. For perfect evidence they even make an intimate ‘S’ video but unlike their thoughts the video goes through some trouble…