Bye-Bye, Earth

From Yen Press:  
Belle lives in a world where people take the form of animals like cats, frogs, and mice and she's the odd one out! This peculiar fang-less, fur-less, scale-less, smooth-skinned girl sets off on a journey to find others like her. However, in order to travel freely, she'll have to wield her Howling Sword and prove herself in battle!