Horns & Heart by Alexa Piper

Rory has survived the apocalypse for two years. He has outrun monsters and humans alike, and while it’s been lonely, he’s doing fine. Until he meets Inkiri.
Horned, blue, and handsome, Inkiri isn’t like the other monsters who try to eat Rory. He’s nice, has a group of friends, and offers Rory more than just shelter.
Rory is determined to enjoy what comforts he can find in these changed times, but he’s soon drawn into a conflict he didn’t even know existed and must grapple with the reality of magic and the dangers it brings.

Horns & Heart is an MM monster romance with humor, fated mates, size difference, and lots of banter.