Hi! It would depend on what exactly are you planing to write.

It might be NSFW if it's just a explicit dragon/demonfuck1ng scene with common kinks or a bit of blood, for example. But if it's too gorey or you're using extreme kink for it and being really explicit in the description (ex: extreme size difference and possible consequences), it would be Dd

I hope it's clear. If it's not, or if you have any other question please don't hesitate to answer us again (⁠ ⁠ꈍ⁠ᴗ⁠ꈍ⁠)