Three ancient deities, in order to give animals that died in the human world a place to rest, created a paradise called Rabi-Land. Animals that re-enter the cycle of reincarnation here are reborn in beast-like forms, allowing their souls to find peace. However, more and more beasts seem unable to let go of their hatred toward humans, gradually turning into “”Beast Demons””—refusing reincarnation and disrupting the peace of the paradise. At this time, a high school girl who loves animals, Yume, and her pet bunny Elina, unexpectedly find themselves in this world. After learning about the situation in Rabi-Land, they decide to form an investigative team with other beast companions to uncover the dark force behind it all. Faced with one beast after another, filled with hatred and resentment toward humans, how will Yume and her team navigate the dangers, heal the wounded souls, and at the same time, save Rabi-Land from destruction?