Twenty Again (2015)

Due to an unplanned pregnancy, Ha No Ra married young and dropped out of school. But after two decades as a housewife, she finally gets the chance to experience college, alongside her 20-year-old son Kim Min Soo and his girlfriend Oh Hye Mi. Further complicating things, No Ra already has a strained student-teacher relationship, as her husband Kim Woo Chul and her first love Cha Hyun Suk wind up being her professors.