Hyuna and joon were an item but Joon cheated,played and broke hyuna but enough was enough hyuna was never going to forgive him and thus sought revenge.She asked her bestfriend;Hyunseung to be her pretend boyfriend to seek revenge on Joon,hyunseung being the bestfriend he is,agreed but what happens during this play of revenge the two gain unknown feelings and not knowing in this game they can loose the other.

Hyuna-After you destroyed my heart I swore to make you payback and when I succeed to never fall in love again with another man but I broke that promise.

Hyunseung-I told myself that it was wrong to fall in love with ones bestfriend and even more wrong when that bestfriend was the ex of your other bestfriend [Junhyung not joon e_e]

I was inspired by this video!