A mother with a heart of gold navigates the cutthroat world of private education when her daughter tries to join a celebrity math instructor's class.

Jeon Do-yeon, Jung Kyung-ho, Lee Bong-ryeon, Oh Eui-sik, Shin Jae-ha, Roh Yoon-seo, Jang Young-nam, Kim Sun-young, Hwang Bo-ra, Heo Jeong-do, Lee Chae-min, Kang Na-eon, Ryu Da-in, Lee Min-jae, Kim Tae-jeong, Ji Il-ju, Lee Do-hye, Kim Da-huin, Lee Ji-hae, Park Hui-eun, Choi Hee-jin, Yoo Jun, Jeong Han-seol, Hwang Jae-yeol, Jang Tae-min, Go Ae-ri, Lee A-jin