Long-Term Relationship summary: From college until now, Boyoung and Haewon have maintained a long-term relationship spanning 10 years. Despite facing a harsh reality and an uncertain future, they spent their time supporting and relying on each other—until, at some point, they gradually began to quarrel. During those 10 years, they believed they knew each other better than anyone else, yet over time, understanding one another has become increasingly difficult.