Cruel Winter Blues (열혈남아 Yeol-hyeol-nam-a) is a 2006 South Korean film by South Korean director Lee Jeong-beom. It stars Sol Kyung-gu and Jo Han-seon as gangsters Jae-Mun and Chi-Guk.
Jae-Mun is a seasoned veteran of the gang. Although a physically imposing black belt in Taekwondo, Chi-Guk is a soft-spoken newcomer to gang life, who is quietly offended by Jae-Mun's arbitrary and random acts of cruelty and rudeness against him and others. They travel to a remote town to perform an assassination of rival gangster Dae-Sik, who was responsible for the death of a friend of Jae-Mun.
While waiting for an opportunity to perform the hit, Jae-Mun coincidentally befriends Dae-Sik's mother (played by actress Na Mun-Hee) and spends some time with her. She comes to treat him as another son, even buying him clothing. A tragic plot develops, culminating in a bloody showdown between Jae-Mun and Dae-Sik.