In this anthropomorphic animal society, Beastars are those animals that have proven themselves worthy of leadership by combating inequality and uniting carnivores and herbivores. Cherryton Academy has not had a Beastar for five years, but after an alpaca was murdered on school grounds, tensions among different species have escalated, making it more important than ever for a Beastar to maintain peace and harmony. Louis was initially chosen as Beastar, but he rejected the offer and left the academy. As a result, the student council declared that anyone who catches the murderer of the alpaca would become Beastar. Legoshi, a strong wolf with a sense of duty to protect the weak, is driven by his feelings for Haru, a white rabbit, to investigate the murder.