you and heeseung are angel, but when both of you are still alive you were a couple. But he broke up after 2 years of break up because he was going to another country and never coming back, but he got into a car accident that made him died, while you died because the swing on the mountain broke and you rolled down and died because of Rocks, and when you saw him in heaven you hated him while he's teasing you for you cause of death "hey, how was the swing?" he laughed