Du Beonjjae Nampyeon

Eun-Ha Lee is a smart, successful lawyer who has life figured out... that is, until she loses both her parents in a tragic accident and divorces her husband, Tae-Yang, a famous actor, who she discovers has been cheating on her. Things take a turn for the surreal after Eun-Ha slips on a staircase only to wake up in her past. She is now 22 years old and back in law school. Determined to make better choices in this second life, Eun-Ha swears off romance only to realize her male best friend, Seung-U, has been in love with her this whole time!

(Source: Tapas)