"Your light is gradually being obscured by my darkness, I'm so afraid" Kim Minhee. Just by hearing the name, Everyone would start drooling and running to the girl of their dreams. She is popular at their school for being a great dancer and singer, Plus. She is kind, Good in acting and sports. By her actions, Everyone would think she is a good person. But Sana herself thinks she isn't, And instead. She thinks of herself as a fiend because of her dark secret. Meanwhile, Song Yuqi is the exact opposite of the famous girl. However, Although she is kind, We can't deny the fact that she is still bullied by her classmates for not being rich and confident just like the other students. Unexpectedly, Her whole life changed when she discovered a monster is protecting her although it is just the chaos itself.