The icon for the "Horns" Tag

The sheep/ram thing is actually really frigging cute. Does anyone know which Doujinshi it comes from? I looked at all the Doujin covers with the "Horns" tag, but couldn't seem to identity it. :(

I'm assuming this is OK to ask since the image is literally hosted on this site, so it's probably from a licensed work here somewhere :)

IIRC it's from the book "My Bride is the Demon Lord!?"

Thanks for the help :)