Ji-woo, an outcast at a prestigious private school, meets Hak-sung, the school janitor who is actually a mathematical genius who defected from North Korea.
Choi Min-sik
Kim Dong-hwi
Park Hae-joon
Park Byung-eun
Jo Yoon-seo
Score: 5.7
Score: 6.2
Score: 7.1
Score: 6.6
Score: 6.2
Score: 6.4
Score: 7.9
Score: 7.1
