With a broken heart and an uncertain future, Serin found herself desperately looking for direction. When she was in the pits of depression and desperation, just about to throw hands, an offer that seemed too good to be true fell on her lap. She was going to be Lee Taemin's english teacher. Teaching english was supposed to be the boring job that would help her get through the next year or so, but her strange discoveries about her student started to ring the warning bell

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 :)

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?