Middle school student Lim Jugyeong endures relentless teasing for her plain appearance until she learns to use cosmetics as her tool for transformation. Applying BB cream, lip tint, eyeliner, mascara, double eyelid tape, and colored contact lenses with precision, she changes from a bullying victim into an admired beauty. Praised for her seemingly flawless looks, Jugyeong enjoys a smooth school life as long as she keeps her bare face concealed.
Her routine is disrupted when Lee Suho, a new transfer student, joins her class. His handsome features quickly make him popular. During an unexpected moment, he becomes the first classmate to see Jugyeong without her makeup. Fearing her secret will be exposed, she will go to any lengths to keep it hidden. Yet, as her connection with Suho deepens, she begins to wonder if true beauty is only about outward appearance.