Tia is a waitress that was left at the alter by her cheating boyfriend. She thinks all men want one thing and no man that comes to the night club has no where near peaked her interest. Until Joon talks Mr.Rain in to going to the club with him guess who their waitress is?

Jihoon is the world-famous sunbaenim who has a legendary hallyu wave legacy, while Jieun is that successful hoobae who's been conquering the charts for years.  They are also the worst hidden enemies within the kpop industry. As fate would have it, they have to complete an album together. Will it be World War 3, or will sparks fly?

Jieun is in love with the man of her dreams. Jihoon has finally found his match. However, they want different things..will it work? Or will it be game over? **Oppa! is the sequel to Sunbaenim!, do check it out first, if you want :)