True Beauty (2020)

From the webtoon of the same name

Im Ju-kyung (Moon Ga-young), an 18-year-old high school student, has an inferiority complex about her appearance. Constantly discriminated against by her family and classmates, she quickly tried to change things. She started to learn how to apply makeup by watching videos of makeup tutorials on the Internet. She managed to master the art of makeup to perfection just before transferring to her new school. Her makeover was a real transformation as she quickly became very popular.

Despite her newfound popularity, Ju-kyung still considers herself ugly, and her biggest fear is that her classmates will see her true face. But one of the students at her school knows her. Lee Su-ho (Cha Eun-woo), the prototype of the popular and beautiful student, had already met Ju-Kyung in the open.

Su-ho is popular among the female students at school, but he hates being the center of attention and is often perceived as distant and cold. He has a dark side as he hides a dark secret - a tragic incident in the past - that haunts him. He and his former best friend, Han Seo-jun (Hwang In-youp) have grown apart because of this incident,

Everything gets even more complicated when Ju-Kyung gets closer to Han Seo-jun...