For Mino, happiness is as simple as loving and being loved by Jinwoo. 

However, he also longs for the warmth of his own family that he lost twelve years ago.

When he got himself and Jinwoo in an accident, that results him losing the guy he loved so much and his own ability to walk, he was faced with two choices. To go back to the past to save Jinwoo or to save his own family. 

He forgot one thing though.

Even if he manages to get back, how can he save any of them when he will forget all of his memories?