The film centers on a dedicated student teacher named Choi Hong (Kang Hye Jeong, from Old Boy) who finds herself being propositioned by English teacher Lee Yu Rim (Park Hae Il, from My Mother, the Mermaid), a man who just so happens to be the person in charge of her class! But this is no innocent flirtation. Not one to mince words, Yu Rim simply asks the unsuspecting Choi Hong to have sex! To make matters even stranger, Yu Rim already has a long-time girlfriend. His wandering eye relates to his beliefs about true love: for him, there is no such thing. In his view, dating is meant solely for sexual gratification.

Choi Hong has a boyfriend of her own, a man she one day hopes to marry. But like Yu Rim, she harbors doubts about relationships, a feeling directly connected to some unpleasant experiences in her past. Surprisingly, Yu Rim’s methods actually seem to charm her. But as this unconventional romance takes off, will the two cynics realize what the real purpose of dating is? And what about their significant others? Or the whispers in the teachers’ lounge about their behavior? Filled with bawdy humor and fun performances, Rules of Dating is one romantic comedy that’s not afraid to break all the rules!