Sometimes while the timing works out at first, it doesn't match up in the end. Things fall apart and first loves come to an end. Life is constantly changing and pulling you in different directions and teaching you new things. For Dayoung one of the lessons she learned has stuck with her. Life just happens and you can't protect yourself from everything, sometimes you get hurt. So as her first love goes up in flames Dayoung learns how to move on with life after Ilhoon, even when he's still around.