An old classmate and friend of the twins claims that he has been looking for them for several years before he transferred in to the same high school as they. There he ends up in the same class as Se-wa. Twins' classmate whose younger sister died because Se-wa's father cannot help her years ago and his younger brother was killed by boys. Living with his widowed father one day Gi-hoon met Se-wa who transplanted his sister's heart. Gi-hoon was pose as childhood friend of twins later he fell in love with Se-wa. развернуть