Ha Neul is asked to make the class materials for Yi Boon’s class. Ha Neul comes up with a novel idea of teaching students which Yi Boon cannot understand. Meanwhile, upon Sung Soon’s request, an admissions officer from Yeonhui University comes to visit Daechi High School, but he turns out to be a newbie who doesn’t know a thing about the university admissions system.
Kim Jung-young
Moon So-nyeo (Go Ha-neul's mother)
Jeong Taek-hyeon
Hwang Bo-tong
Ha Jun
Do Yeon-woo
Ra Mi-ran
Park Seong-soon
Seo Hyun-jin
Go Ha-neul
Jung Hae-kyun
Moon Soo-ho
Jo Yeon-hee
Kim Yi-boon
Park Ji-hwan
Song Yeong-tae
Lee Chang-hoon
Bae Myeong-soo
Park Yu-rim
Ryu Jin-hee
Kwon So-hyun
Song Ji-sun
Ye Su-jeong
Yoon Yeo-hwa
Kim Hong-pa
Byeon Sung-joo
Lee Yoon-hee
Lee Seung-taek
Maeng Sang-hun
Go Sung-chul (Go Ha-neul's father)
Park Ji-hoon
Ku Jae-hyun
Lee Eun-saem
Jin Yoo-ra
Woo Mi-hwa
Han Jae-hee
Heo Tae-hee
Ha Su-hyeon
Yoo Min-kyu
Ji Hae-won
