The Chocobros go to rescue Prompto but are forced to watch him be treated like an animal- he has on a ring gag that keeps his mouth open so he's drooling all the time and Ardyn forces Prompto to eat cum and lick it up off the floor as if he's purposefully made the mess.

Gen between the chocobros, and they manage to rescue Prompto and yeah. Happy or sad ending is up to the filler, but it would be Ardyn forcing the chocobros to watch Prompto humiliated basically