This is a localized term often used in "Hentai" or adult doujin contexts to describe a specific fantasy trope involving impregnation or "breeding" themes.
The prefix followed by a series of numbers is the standard identification system used by DLsite , one of the largest Japanese digital retailers for indie and doujin works. --- -ENG- JK Molester Train Seeding Uncle -RJ01141999-
Given the format of the RJ code, this specific work is most likely an . This is a localized term often used in