When we were young, we promised to each other that we would get married when we both grew up. I was 11 years old then he was 14. Before they left, that was our promise to each other.But before they could leave the country, an incident occurred.They were hit by a car and he was in the worst condition and as a result he lost his memory. After a few years, his memory gradually returned.And you know what hurts? He thought that the person he had promised to marry before was my sister.And I know my sister likes him.So my sister pretended to be the one he promised to marry. It hurts so much on my part, but I can't do anything.I have to accept that I am no longer the woman he promised to marry, but my sister. But what if one day all his memory returned?what will happen? Will she sacrifice her own happiness and the man she loves for her sister or will she fight and take him back? If you want to know what will happen next, read this story.