Still 17
서른이지만 열일곱입니다 (original)
Gong Woo-Jin is a 30-year-old single man and he works as a set designer. Due to a trauma he experienced 13 years ago, he does not want to have a relationship with others. When Woo Seo-Ri was 17, she fell into a coma. 13 years later, she wakes up from her coma. Her mental age is still that of a 17-year-old, but she is now 30-years-old. Gong Woo-Jin and Woo Seo-Ri get involved with each other and fall in love.
Starring Yang Se-jong, Shin Hye-sun, Ahn Hyo-seop, Ye Ji Won, Wang Ji-won, Jung Yoo-jin, Jung Eu-gene, Yoon Sun-woo, Park Si-eun, Yoon Chan-young
Watch "Still 17" from streaming services Netflix, Rakuten Viki released in 2018. It's a comedy and romance show, and has a rating of 7.9 out of 10 from Imdb which is usually fine for this kind of show.