Kim Myungsoo always want to protect the woman that he loves very much.He always loves the lucky girl.But he just a bestfriend to her and always be a bestfriend no matter what happen.A happy moment in Myungsoo life when he get to married with a person that he loves but still he just a bestfriend.The worse is the girl actually loves Myungsoo's step brother.Myungsoo willing to do anything to make she fall in loves with him