Between Jaeyoung and Jaeyoung

The "Ha Jaeyoung" whom Seou had a crush on in high school has died. Seou meets the deceased Ha Jaeyoung in a dream, and as the past is reenacted in the dream, Seou tries to change it to save him. Meanwhile, the death of another Ha Jaeyoung gets entangled, complicating the present. Before this dream that transcends time ends, can Seou save both Ha Jaeyoungs?