
I considered the unknown model for the poster could be ero actress Oahm Da-hye, who was the body model on the poster for the 2007 Korean movie, Cadaver (featured here) but dismissed that since Da-hye is a big name in the Korean adult industry and would most likely not model anonymously for a poster. Yes, I know her face wasn't shown on the poster for Cadaver, but there was plenty of press revealing the owner of the body as Da-hye. There has been zero press about the identity of the Ogamdo poster girl.
After searching through Korean cyberspace and coming up with nothing, I spoke with a couple of contacts and learned of some reasonable speculation that the mystery model may be lesser-known ero actress Cha Rin, whom yours truly met a few years ago after a stage performance in Seoul.