So what sort of crime would we list this under?
Certainly not the suggested "Puppy Mill" ... MC simply isn't the type, and he'd breed for actual quality , not "sort-of-breed-standards".
"Unlicensed genetic engineering"... hard to make that stick, given that it's basically done with Royal Approval...
Same for "Unlicensed Breeding".... Royal Approval... On Crown Property..
Prostitution... nope... Don't forget that Dragons are legally domestic animals.. Can't prostitute domestic animals...
No doubt it'll require
something from MC, in dragon form or not, so you could argue Bestiality, but.... you'd have to reaaallly stretch things ...
( yeah, yeah... Dragons = ersatz Harem... But the author hasn't crossed
that line.... So Far... )
There's the creative dodging of Monopolies, but that isn't a Crime, unless that Monopoly was granted by the Kingdom, which as far as I can tell is not the case..
Honestly, the only Crime that I can see is the total obliviousness of MC for the Princess' Feelz... But that's par for the course when Plotanium is involved... A mere peccadillo the author
could have fleshed out more..