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: 7.0
Score: 9.0
Score: 6.1
Score: 7.5
Score: 6.8
Score: 6.7
Score: 6.7
Score: 7.1
