Oukami Shujin to Usagi Maid-chan

Coco, a rabbit girl, starts working as a maid in a large mansion. The owner, Master Lucio, is a handsome but lonely wolf man who is feared by everyone around him because of his "beast reversion," a condition that makes him act more animal than human. As a maid, she does her best to take care of him, but his attitude remains firmly closed and distant. Until one day, when Master Lucio becomes strongly attracted to the scent of Coco's body…!

(Source: Manga Park, translated)