Second 20’s is a story revolves around a 38 years old housewife, Ha No Ra (Choi Ji Woo), who decided to go back to school and experience the college life for the first time. She spent the last two decades as a housewife after she got married and became a mother at the age of 19 years old. Her 20 years old son, Kim Min Soo (Kim Min Jae) and his girlfriend, Oh Hye Mi (Son Na Eun) are her classmate, while her husband, Kim Woo Chul (Choi Won Young) and her first love, Cha Hyun Suk (Lee Sang Yoon) are the professors in that college.
- Drama: Second 20’s (English title) / Second Time Twenty Years Old (literal title)
- Revised romanization: Doobunzzae Seumoosal
- Hangul: 두번째 스무살
- Director: Kim Hyeong-Sik
- Writer: So Hyeon-Kyeong
- Network: tvN
- Episodes: 16
- Release Date: August 28 – October 17, 2015
38-year-old Ha No-Ra (Choi Ji-Woo) dreamed of becoming a dancer when she was younger. She met her future husband, Kim Woo-Cheol, when she was only 19-years-old and became a mother unexpectedly. Since then, she focused on her life as a wife and mother. Ha No-Ra then decides to attend the same university as her 20-year-old son Min-Soo and faces life a second time like a twenty year old.
- Second 20s Torrent Files takes over tvN’s Fri & Sat 20:30 time slot previously occupied by “Oh My Ghost” and followed by “Reply 1988” on November 6, 2015.