Im Joo Kyung (Mun Ka Young) is a high school student who is optimistic and positive about most things.... Except for her appearance! She hates the idea of being seen in public without makeup, but fortunately she has become a self-taught makeup expert, with a little help from a plethora of video tutorials on the Internet. 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 classmates discovering her looks behind the makeup! In fact, there is only one person in the school who has seen her without her “mask” - Lee Su Ho (Cha Eun Woo). He is a top student with impressive basketball skills. He is also very handsome, and many of his female classmates are crazy about him. However, Lee Su Ho harbors some dark secrets from his past, and shies away from attention in class.Gradually, these two individuals bond.... And they learn more about each other's secrets!.