PROLOGUE    

You were Lee Sunghwan's hard headed, Trouble maker, and Crazy dongsaeng, Lee Minhee. You like troubles a lot. You keep on getting b's on your tests and keep on skipping school. Your brother Lee Sunghwan decided to just home-school you, expecting that he'll see an improvement. But the result is the opposite. You didn't listen to your 'personal teacher'. One day your brother Sunghwan, leaved to go to Japan and hired your personal 'Maid' or more-like 'Baby Sitter.' Sunghwan leaved Korea calmly as he thought you'll behave this time. But life is so bad to him. After he got to Japan someone called him saying that You, Lee Minhee his dongsaeng burned the whole house down after cooking. He came back to Korea after 2 months you burned the house. You are currently staying at your sister's house. Sunghwan thought for a while after deciding that you should just live with him until the house fully remodelled. You accepted his decision and moved with him. But he never mentioned that you'll be staying with another 12 young Rookie Idol 'EXO'.

"BOYS, I'LL BE GOING TO CHINA THIS WEEK SO I HOPE YOU'LL TAKE CARE OF MY LITTLE SISTER WELL ARRASO?"