Nyannya!(2006)

Nyannya!

The selfish, conniving and ridiculously adorable kitten-prince of a kingdom of cats falls for the royal gardener and is determined to have him whatever the cost. He just needs to get rid of the gardener's lover first!

(Source: Kadokawa, translated)

Note: Includes the one-shots Karakuri Bojou (カラクリ慕情, Longing Mechanism) and Yuki Ori no Sato (雪織りの里, Snow-Strewn Hamlet).