After a year Gyu Won had comeback from UK, but Le Sin and her had not spoken one word, so after their 1º conversation being told to not look for him breaks her, and receive a call from USA can be her heart saver, but there, can she forget Sin and meet someone else enters her heart? What if he's equally heartbroken?

This is a cross - over between Hearstrings and Love Rain.. a what could have been.