When Jo Gang-Ja attended high school, she was notorious for fighting. She gave birth to her daughter A-Ran in her late teens and became more responsible. Her daughter A-Ran is now a high school student, but A-Ran is bullied at school. Jo Gang-Ja decides to go back to high school to protect her daughter. Jo Gang-Ja becomes a high school student again.
as Jo Kang Ja
as Park Noh Ah
as Oh Ah Ran
as Oh Jin Sang
as Han Gong Joo
as Jong Man
as Park Jin Ho
as Do Yoon Hee
as Jin Yi Kyung
as Hong Sang Tae
as Wang Jung Hee
as Hwang Min Joo
as Na Do Hee
as Do Jung-woo
as Joo Ae-yeon
as Kang Soo-chan
as Go Bok-dong
as Jo Kang-ja's mother-in-law
as Lee Hwang Song
