Go to DLsite’s search bar and enter RJ01279104 (with or without the “RJ” prefix). If a product appears, you’ve found your match.
That said, here are the most likely possibilities for what this could refer to — and a short blog-style post you can use or adapt depending on the actual context. rj01279104
Available on specialized digital distribution platforms for doujin works. Gameplay and Mechanics Go to DLsite’s search bar and enter RJ01279104