You and Seung-hyun is friends, he is 16 and your are 15. He is the biggest troublemaker in school, he smokes, gets into fights, and skips class. But when he is with you, he didn't smoke, he didn't fight, and he didn't skip classes, around you he acts like a lost puppy. But if you were sick and couldn't come to school, he would be at troublemaker at school, and then when schools over, he would come over to your house and check on you.