Based on similar codes, it likely features voice acting focused on specific themes (e.g., ear cleaning, roleplay, or "co-sleeping").
You can find the full details, voice actor/actress names, and legitimate purchase links on DLsite . Safety & Best Practices Download Voice RJ328942 rar
If you have the .rar file and it shows gibberish filenames, use WinRAR or 7-Zip with the character encoding set to "Japanese" to ensure the files extract correctly. Based on similar codes, it likely features voice