Na Jaemin,a popular guy who is known as "Cold Prince" because his cold behavior and his quiet behavior and he is so handsome too many girl like him but he didn't care and he is popular because his treatment to his girlfriend but we don't know who is she since he was very cold and very quiet boy

And he is your crush too you like him and One Day when you walk to go home with Karina And Haechan your childhood friends when in stairs suddenly you almost fall from stairs from behind but suddenly someone is prevent you for that and it's Jaemin he prevent you from fall with his feet on your back

"Can I let go my leg now?" He say in his cold tone