The RJ number in the title might refer to a specific release or identification number for the anime, indicating its categorization within doujinshi (indie) works or a similar classification system used within the Japanese fan content community.
The game centers on a "stealth" system where the player must navigate the household and interact with the protagonist's stepsister, Hinata, without being caught. ore wa gimai no heya ni shinobikomu rj01319311
The performance is usually cited as the strong point, capturing a mix of youthful innocence and the tension of the "sneaking" scenario. The RJ number in the title might refer