Some people are envious of her job, being a personal assistant of six famous kpop artists collectively called BOYFRIEND, but for Luna, it's a punishment and living with them is hell. Donghyun is okay but keeps insisting that he doesn't need any help, making her feel useless. Hyunseong and Jeongmin are just trying to be nice but she doesn't know what really is going on in their minds. The Jo twins, Youngmin and Kwangmin are treating her like she's invisible. Oh, and did she mention their maknae, Minwoo? She just can't live a single minute with him without putting up an argument. Would they ever appreciate Luna's presence while she still have time to be with them? Would they treat her differently if they know her true identity and what she's going through? When she's in trouble, would anyone of them care to defend her and say "Don't touch my girl!"?

You've been a student of Top Talent Academy ever since your aunt recommended you in 7th grade. Your parents are divorced and you have no idea where your father is. Your mother is back in the states working hard to send money to you so you can attend school and live in South Korea. You currently live with your aunt who is a math teacher at TTA, she is also YOUR math teacher. You are intelligent and multi talented but hide it all because of one person, your bully. Miss Kim Mi Yun is popular, talented, and overall beautiful. Ever since you started school at TTA, she's been putting you down, surpressing your talent. She never liked you but you've never tried to do anything to hurt her. Why does she hate you? You'll never know. But you do know that when you are down, there's one thing that will get you right back up. Boyfriend. No one else knows you like them, and why should they? Especially not Miss Kim Mi Yun who is utterly obessesed. What happens when one day, Boyfriend show up at your school, announcing they are entering Top Talent Academy? Your whole world is turned upside down and inside out.