You and Yoon Du Joon are finishing high school seniors when Du Joon had to move to America to study. Before he left, you guys made a promise: "Let's get married when I come back. Promise that you'll wait for me." You suddenly had family problems, so your mom made you engage to a rich stranger. You didn't want to hurt your family or Du Joon. What will Du Joon think of you when he comes back to America. Will you guys still love each other and will he forgive you?  

Im Yoona is a 16 year old girl that has a sister named Jung Jessica, who is 15 years old. They go to the same school that isn't so great. Yoona's life changes when she saves a boy named Yoon Du Joon(16). He lost his memory so he goes to the same school and lives in the same house with her. After a while, they start to have feelings for each other. Apparently, Jessica has feelings for him too. He only has feelings for Yoona but he pities Jessica. But when his me