Those Times We Had Been In Love - S1.E9

After getting revenge on Hyun Seok, Ye Rim begins to hit on Ban Do. Ban Do hesitates as he's faced with a chance to change his life around. However, he keeps thinking about Jin Joo who seems sad. He decides to take Jin Joo and his friends on an impromptu backpacking trip. However, someone who wasn't invited decides to join their trip.