Himegimi to Sanbiki no Kemono (The Princess and the Three Beasts) by Mitsubachi Miyuki 4 volumes (complete)
Violet is the 6th generation princess of the Kingdom of Alba. She becomes the target of the thieves known as the three beasts: Crow, Snake and Fox. I find the exploits of the day a bit boring and I find the conflict and build up to the romance a bit slow. But I like the character designs. I read the 1st chapter before but I was only able to pick it up again because it had similarity with my favorite ongoing anime, Kamisama Hajimemashita.(which will be on a separate future entry :D ) And inspired with the beasts theme, I've created a tag "beast" for other reverse harem works with supernatural beasts or animal transformations that you might want to check out.