"Kemonozume" is a 13-episode anime series that blends elements of romance, horror, and action. The narrative centers on Toshihiko Momota, a young man who belongs to the Kifuuken, a secretive martial arts group tasked with hunting Shokujinki, humanoid creatures that consume human flesh. These creatures can transform into monstrous forms, making them formidable adversaries. Toshihiko's life takes a dramatic turn when he falls in love with Yuka Kamitsuki, a mysterious woman who harbors a dark secret: she is a Shokujinki. Despite their opposing natures, their relationship deepens, challenging the boundaries between humanity and monstrosity.

The series explores the tension between Toshihiko's duty to the Kifuuken and his love for Yuka, as well as the moral complexities of their situation. Yuka struggles with her dual identity, fearing her own monstrous instincts while yearning for a normal life with Toshihiko. Their relationship is further complicated by the arrival of Kazuma Momota, Toshihiko's older brother and a ruthless Kifuuken leader, who views Shokujinki as irredeemable threats. Kazuma's relentless pursuit of Yuka forces Toshihiko to confront his loyalties and question the rigid ideologies of his clan.

As the story progresses, the Kifuuken's history and the origins of the Shokujinki are revealed, shedding light on the cyclical nature of violence and hatred between the two groups. The series delves into themes of identity, prejudice, and the consequences of blind adherence to tradition. Supporting characters, such as the enigmatic Shokujinki leader Dan and the conflicted Kifuuken member Chizuru, add depth to the narrative, highlighting the gray areas between good and evil.

The plot is marked by intense action sequences, emotional confrontations, and surreal, often grotesque imagery, reflecting the series' exploration of primal instincts and human nature. The relationship between Toshihiko and Yuka serves as the emotional core, driving the story toward a climactic resolution that challenges the characters' beliefs and forces them to confront the consequences of their choices. "Kemonozume" presents a unique and thought-provoking narrative that intertwines romance and horror, offering a distinctive take on the struggle between love and duty.