Ms. Maeng, a small-town teacher, unexpectedly joins the team responsible for creating South Korea’s most important exam: the College Scholastic Ability Test. She thought it would be all about academic prestige and scholarly debate but instead finds herself locked away under spy-level security, her phone confiscated and surrounded by office politics. Can this unlikely underdog turn test stress into test success, or just test everyone's patience?
| Actor | Role |
|---|---|
 Lee Sun-binMaeng Bo-ram | Maeng Bo-ram |
 Yoo Jae-myungMoon Joo-yeol | Moon Joo-yeol |
 Kim Young-minPark Kyung-tae | Park Kyung-tae |
 Jun Seok-hoKi Joon-su | Ki Joon-su |
 Kim Gyeong-minNot listed | Not listed |
 Lee Jin-heeNot listed | Not listed |
 Hwang Bo-raNa Eun-mi | Na Eun-mi |
 Jeong Soo-youngNot listed | Not listed |
 Lee Joong-okNot listed | Not listed |
 Ryu Kyeong-hwanNot listed | Not listed |
 Choi Si-wonNot listed | Not listed |