After five years together, Seji and Yeonoh sometimes clash due to their personality differences, but they believe that their affection for each other is always strong. Yeonoh is sent to a regional research complex, where she unexpectedly encounters her junior Jeonga, with whom she had a complicated relationship during college. After a fight with Seji, Yeonoh drinks to excess with Jeonga and wakes up in an unfamiliar bed the next morning. Unable to bear the weight of her guilt, Yeonoh confesses the truth, but Seji silently sends her away. A little while later, Yeonoh is shocked to receive news from Seji that he has started seeing someone new. In response to this, Seji makes a proposal to Yeonoh. "How about we all meet up?"