This global discussion board contains some info about South Korea including the red light district (rld) in Yongsan with hidden camera pix and the p4p sex trade in Seoul including the infamous Miari RLD. Very dated information from World Sex Guide.
Fun with Korean pussy and Korean Escorts as prostitution in South Korea is available inside red-light districts like Hooker Hill for locals and there is a large freelancer scene for foreign expats and sex tourists.