Jeong-woo moves into a new home and runs into his old rival Ha-neul, who is his neighbor. As her well-being takes a toll, Ha-neul makes a stand at work.

When Jeong-woo's home gets broken into, Ha-neul asks him to stay at her place. After the two share a night of fun, she decides to help him in his trial.

After a trip together, Jeong-woo wonders if he was Ha-neul's first love — until she goes on a blind date. Ha-neul goes on an interview for a faraway job.