Sung-Ho is a 16 years old student who recently joins Radiant high, and he has a secret, he isn't joining to discover his talent but rather to be closer to the person he harbors romantic feelings for, that person isn't just anyone but Young-Mi Ahn who is the nurse working in Radiant high, the 10 years age gap between them would be the least of his worries as Young-Mi is a member of a hated sect and she is considered to be the most dangerous woman in the world.