Tired of being labeled a "clumsy good-for-nothing" by her classmates, Hana Aoi decides to turn things around by responding to a job ad for part-time work at a local zoo. Although the rundown zoo features a garish design and few visitors, it feels like paradise to Hana, who eagerly anticipates spending her evenings tending to adorable animals. That is, until she encounters a giant, anthropomorphic rabbit! Hana quickly learns that the rabbit is actually the zoo director, Shiina, a human cursed by a ghost with the peculiar power to transform ordinary animals into humanoids. To regain his original form, Shiina must demonstrate his love for animals by making his zoo the best in the world. However, adhering to a principle of only doing fun things, he finds animal care too tedious. This is where Hana steps in. Bound to the job—and to secrecy—by the self-centered rabbit, Hana realizes that if she hopes to change herself, she must first survive a world where the boundary between man and beast is no longer clear.