Gentlemen's Agreement Between a Rabbit and a Wolf(2007)

Usagi to Ookami no Shinshi Kyoutei

Co-workers Kai and Toga have an ongoing feud that makes them look like sworn enemies! But their snarling sarcasm barely conceals the fact that they’re wild for one another. Can a lonely, lovelorn rabbit and a ravenous wolf learn to play nice…or will they devour one another in a flurry of fur?

(Source: Juné)