Kim Hee-sun
The protagonist, Jo Kang-ja (Kim Hee-sun) was once legendary for being the toughest, most feared troublemaker at her high school in Busan. Due to her pregnancy in her late teens, she drops out of school and tries to become a responsible mother to her daughter, Oh Ah-ran (Kim Yoo-jung). Fast-forward to the present, Kang-ja is now 34 years old and Ah-ran is a teenager attending high school. The two have a contentious relationship, with Ah-ran ashamed of Kang-ja's unrefined "ajumma" manners.