I would love to see some fluff from these desperately in love lovebirds. Canon routes and AUs are both fine, and as far as canon routes I generally prefer it to either be acadimileth or post canon (engaged, newlyweds, already married for a while)
I would really like a winter time setting, especially if there's a backdrop of a holiday or festival...maybe one that involves gift giving. It should definitely be cold and snowy and maybe they need to keep each other warm.
Smut is incredibly welcome, but if you're not comfortable with that any sort of being desperately in love is fine! I really like them having kids together so having established kids, Byleth being pregnant, or getting pregnant are welcome!
DNWs:
-ABO/Omegaverse
-noncon/dubcon
-monsterfucking/nonhuman characters
-immortal Byleth
-watersports/Scat/gore/emoto/vore
-lactation
-dehumanization/humiliation/degradation
-trans characters
-yandere characterization
-1st person or 2nd person POV