She Was Pretty
그녀는 예뻤다 (original)
Ji Sung Joon has a crush on the most beautiful girl in town, Kim Hye Jin - the only problem is, he's unattractive and lacks self-esteem. As fate would have it, years later Sung Joon grows up to be not only successful, but extremely attractive. However, when he runs into his first love Hye Jin, she has become unattractive and poor. Can their love transcend the vanity they both associated with each other?
Starring Hwang Jung-eum, Park Seo-jun, Siwon, Go Joon-hee, Park Yu-hwan, Lee Il-hwa, Yoon Yoo-sun, Lee Byung-joon, Shin Hye-sun, Shin Dong-mi
Watch "She Was Pretty" from streaming services Netflix, Rakuten Viki released in 2015. It's a drama and comedy show, and has a rating of 7.6 out of 10 from Imdb which is usually fine for this kind of show.