In an alternate world of humanoid animals, the human population has declined drastically. Jin Mazama, a human, attends Seton Academy and meets Ranka Okami, a short-tempered wolf-girl. To calm her down he feeds her meat, only to be invited to join her pack. Jin meets Hino Hitomi, one of the few other humans at Seton, and is instantly attracted to her. Sensing a rival, Ranka challenges Hitomi for Jin, causing her to run away. Jin points out other students normally form packs with their own species. Ranka denies this as a human once beat up bear cubs bullying her. Jin realizes it was him who tried to save Ranka, but the bears beat him up, causing his hatred of animals...