Kim Jong Hyun (Jonghyun) 19 Years old, trouble maker

Kim Kibum (Key) 17 Years old, A rich but troublesome boy

Lee Jin Ki (onew) 21 Years old, Brother of Kim Jong Hyun

Lee Tae Min (teamin) 16 Years old, Innocent boy who has a crush on Minho since his childhood

Choi Min Ho (minho) 18 Years old, Who loves Taemin but is to afraid to confess his feelings

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Jong Hyun survive a car accident when he was just a kid, But his parents sadly not. He's living with his brother Onew, Jonghyun is a really trouble maker but what will he do when he get arrested and they put him in a boarding school. And only can visit his brother in the weekend, He'll learn discipline he'll learn whats good and whats wrong this goes good until he meets a rich troublesome boy named: Key, Key doesn't listen to the teacher he doesn't do things he don't want to. And he hate and really hate the word ''love'', Key got heartbroken by his first love He swore to never love someone again ! but what will he do when he meets jonghyun and fall in love with him ?