A few more prompt ideas to go along with above:

Focusing more on the Straight Shota idea line, as I dont see near enough of those:

A birthday celebration for a young boy in the 9-13 range, being gifted a plump and curvacious slavegirl by his parents to help teach him how to "be a man", proceeding to have a series of scenes with her guideing and goading him to not just fuck her, or fuck her publicly, but to be rougher and more violent, culminateing with the clasic tropes of "you have to kill your favorite pet to prove you've grown up".... further bonus points if the slave/pet girl is a furry of some sort, perhaps even spend a bit of time to set the scene of it being a human dominance / fury submissive world.

a scenario with a lesbian couple being (adoptive or one biologicaly) co-morthers to a lad they wish to raise to be a dominant, training him to treat eachother as sextoys and torture dolls till one day he snuffs one of them perhaps at the sugestion of the other mother... then end with an epiloge of the mother/son pair searching to find a new co-mother for him and her to use in a similar way, perhaps implying the one depicted was not the first.

A clasic of the genera, the good old Anatomy lesson disection... but takein in a slightly diferent direction. instead of a vlounteer from the class, or the teacher herself being the snuffed and disected girl, go full hog and have EACH student supplied with a docile/mindless and/or willing/eager snuffdoll for disection. inspiration here goes back to the old old TV show Dinosaurs, wheren highscooler Robbie was to disect a scantily clad Cave Woman. perhaps play up the theames from that episode, wherin the highscooler feels sorry for the docile snuffmeat and fights an internal conflict... but eventualy goes through with it.