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.
Kim Won-hae (김원해) is a South Korean actor.
See Kim Won-hae's other roles →Kang Mal-geum is a South Korean actress. She graduated in Arts from Pusan National University, Department of Korean L...
See Kang Mal-geum's other roles →Choi Jae-sup was born on September 30, 1973 and is currently 50 years old.
See Choi Jae-sup's other roles →