LOVE. I do not know why everyone needs love. And what is love? No one can define it in detail, no one can formulate it, and no one knows, it has a compounded by. But Love is like a double-edged sword. One side it makes people happy, and another side it make hurt. This is experienced by chon sa .. She loves her sister very much, it make she should be give up Seungri (her boyfriend) to her sister.