There was a girl named Seul Byeol. She was born with a disease called anemiasclerorsis. A rare disease that only attack it inherit family. She had to drank blood forever until she found the cure of her disease. She was transferred to another school named NaGwang High School. She was afraid to get a new friend because of her disease. Her homeroom teacher paired her with Dong Goo. The Class President Nam Woo was curious about the new student Seulbyeol. He had a weird feeling when he saw her. Will Nam Woo know about Seulbyeol's identity? and what happens next??