Nam Jung-eun
Lee Kyung-min / Kevin Lee
Na Hye-ryun
Yoo Dong-joon
Nam Jung-woo, Jung-eun's younger brother
Nam Sang-sik, Jung-eun's father
Yong Joon [Kyung Min's college friend]
Kim Soon-deok, Jung-eun's mother
Lee Pil-deuk, Kyung-min's grandfather
Lee Kyung-hee, Kyung-min's grandmother
Hye-ryun's mother
Joon-ho, Kyung-min's college friend