In school, it has always been Bobby's roof, his place where he could spend lunch break in peace. Everyone knows this. Everyone except of Hanbin so the younger happens to be on the same roof at the same break. What will Bobby do with the stranger on his roof?

  Your first love may be not your only love, but the one you'll never forget. The one which always makes you smile, no matter how sad you are. The one you'll always remember when you fall in love again. The first love is something special. Just as for Mark and Jackson.

Mark is hurt and wants nobody to worry, especially Jackson. Unfortunately Jackson is the one who worries the most.