Jae-yeol and Ji-won's war of nerves escalates after the incident of the Confession Tree. While Jae-yeol is tormented between Hee-jin and Yeo-reum, he finds out about the truth behind his breakup with Yeo-reum. Hee-jin and Ji-won keep running into Jae-yeol and Yeo-reum, and they end up sharing a meal together at the same table.

While Jae-yeol's suspicions grow, Hee-jin applies for a scholarship program in the US. Things become more uncomfortable with the realization that the two must stay apart if she is accepted. On top of that, Ji-won also decides to go to the US to stay with his parents and sister.