Im Joo Kyung is a high schooler who is upbeat and positive about most things – except for her appearance! She hates the idea of being seen in public without makeup, but fortunately has become a self-taught makeup expert, with a little help from a plethora of internet video tutorials. What she has learned online has transformed her life. At school, she is known as one of the prettiest girls in class – although she secretly lives in fear of her schoolmates discovering what she looks like behind the makeup! In fact, there is only one person from school who has ever seen her minus her “mask” – Lee Su Ho. He is a top-grade student with impressive basketball skills. He is also dashingly handsome, and many of his female classmates have a crush on him. However, Lee Su Ho harbors a few dark secrets from his past, and shuns attention in class. Slowly, these two individuals become drawn together – and learn more about one another’s secrets!