He Might Bite!

Black panther Pyo Yoontae returns to So Jeongseo's small town with one objective: to find his first love who had fur as white as snow. Being the school outcast, Jeongseo decides to help Yoontae in the hopes of finally making a friend. Besides, Yoontae's first love surely can't be Jeongseo himself, since he's a weasel with brown fur. But something about Yoontae feels awfully similar to a forgotten childhood playmate, and there is one secret Jeongseo is keeping from him. Every winter, Jeongseo actually sheds his fur and turns snow-white!

(Source: Tappytoon)