Ah-Ren is an ordinary human with severe social anxiety, and he transfers into an animal school that supposedly has no humans at all. Every classmate is some kind of animal, and the teaching staff includes rare species such as Yangtze alligators and pandas. Classes on spinning silk, building nests, bioluminescence, and molting leave him completely lost, the animals beat him again and again in physical education, and the academic subjects crush him too. Graduation comes with a special condition: he has to make friends with every animal on an animal dating app. That nearly impossible task sets up a warm and funny comedy that runs from his early anxiety to a bittersweet goodbye across 52 ONA episodes.