Deep Story(2017)

Original title: 깊은 사정

Hostess Aki has drinks with men and gets allowance in return. She survives day by day until one day she hears from Saiki that there is someone looking for a fake marriage partner. Aki thinks about it, but in the end decides to do it and marries Jin-il when she is on the verge of being evicted. They become a married couple but Jin-il's girlfriend visits from Korea and they have sex every night...