Heeseung's your best friend who was nice, sweet and energetic. But, you noticed that he's been missing for 11 days, which was unusual because he'll always visit you everyday. One day, you were strolling around a forest and you heard Heeseung's voice. You went towards his voice and see that he was with a bunch of unfamiliar people to you, as if they were his friends. But, most importantly.. Heeseung looks different, he looks muscular and 25, yet he's only 16.. You start to be concerned.