In this case, "Part 5" would be the fifth installment of a story titled "Loving Mother," and "Japs 8005" is a catalog number for that file or series. This is the most logical connection to the original "Loving Mother" story as a narrative.
Creators can pursue highly specific themes without needing to conform to the strict terms of service or payment processor guidelines found on more mainstream platforms. Loving Mother Part 5 -Japs 8005-