The anime business of South Korea had been prospering since Kim Cheong-gi's 1976 classic Robot Taekwon V, which was made as the Korean counterpart to Go Nagai's Japanese classic Mazinger Z. Since the South Korean government banned Japanese media (and this includes animes and manga), Korean interpretations of Japanese animes had emerged in the late 1970s to the 1980s, mostly taking on the Mecha/Super Robot concept. However, some Korean animes that have much different concepts had emerged since the mid 1990s to early 2000s.
In 2003, Sung Baek-yeop directed Oseam (Korean: 오세암, meaning: "Five Year Old Temple"). It was a religious drama centered around two orphans, Gami and her younger brother Gilson, as they seek refuge at an ancient Buddhist temple, trying to help each other out through the struggles of life. A rather bland and simple concept, but it still counts as the best Korean anime that was made before 2005, mostly due to the higher-budgeted animation, use of mostly green and yellow as colors, and possibly pretty dialogue.
The film was distributed by Sinabro Entertainment and was not only released in South Korea but also in France. Oseam wasn't dubbed into English, but Region 3 DVD copies of the movie had English subtitles.
In my opinion, Oseam makes Buddhist animes from Japan look a heck of a lot better.