Alnam no Kiba: Juuzoku Juuni Shinto Densetsu

The Pure Capital of Seito rules a land where humans and twelve beast tribes live side by side — but not as equals. Beastmen, who can transform into anthropomorphic animal forms, face deep-rooted discrimination and are treated as disposable. When monstrous creatures called shishimura begin attacking the land, the government pays little attention while only beastmen villages suffer — but as the attacks grow more numerous and reach human settlements, each beast tribe is ordered to send a representative to serve as defenders. Kenbu, a teenage beastman of the Shutsu Tribe, is training as a warrior to avenge his parents who were killed by shishimura. When his mentor Ouken is mortally wounded shielding him from an attack — Ouken was the Shutsu representative — Kenbu volunteers to take his place, uncertain of his own place in a world that views his kind as lesser.