Si-Yeon Yoon

Occupation: Student DoHoons childhood friend and relative as DoHoon knows it. They lived together since she was 5 years old and were always together. She grew close to him and wanted him all to herself which led to her making him an outcast at school. Then in a series of bullying cases DoHoon declared his independence and at the same time he made his wish to transfer but they met again at the high school he transferred to.