Honestly, it seems satisfying. If the dragon can stand to stay in there, and the gazelle gets used to it, I imagine the two might end up enjoying the experience.
Mm yes, my favorite kind of vore setting~ Where it can be enjoyable for everyone (Whether they want to openly admit it or not hehe). It's not the only scenario I'll do of course, but it's my favorite one.
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DaeBelly
Thing is, the gazelle wouldn't be able to digest that dragon, considering it's a herbivore. Just makes it a more interesting experience.