In a world where beastmen have existed in secret for centuries, a young tanuki named Michiru finds herself suddenly transformed into one of them, fleeing to the safe haven of Anima City where such beings live openly. This vibrant and action-packed anime follows Michiru as she navigates a metropolis teeming with animal hybrids, struggling to understand her new abilities and uncover the truth behind her sudden transformation. She crosses paths with the cynical wolf beastman Shirou Ogami, a detective who is deeply distrustful of humans but reluctantly agrees to help her. Together, they delve into the city's dark underbelly, confronting prejudice, political corruption, and a mysterious cult that threatens the fragile peace between humans and beastmen. With its neon-lit streets and high-octane chases, BNA blends social commentary with thrilling supernatural drama, exploring themes of identity, discrimination, and what it truly means to be human.