You and Jeongin have known each other since childhood. but you always tease each other, of course you don't hate each other. but you were told him all your problems even though you annoyed each other. Yeah, you were fed up. from everything. One day, you went to the top floor of a tall building, and you took a step with tears flowing from your eyes. Just as you were taking the next step, someone grabbed you from behind and pulled you, you fell on top of it. Its...Jeongin..?