Nobody's Daughter Haewon (2013)

Hae-won, a college student, wants to end her secret affair with her professor, Seong-jun. Feeling depressed after bidding farewell to her mother who is set to immigrate to Canada the next day, Hae-won seeks out Seong-jun again after a long time. That day, they run into her classmates at a restaurant and their relationship gets revealed. Hae-won gets more agitated and Seong-jun makes an extreme suggestion to run away together.