The story takes place in Japari Park, an enormous integrated zoo built somewhere in this world. A mysterious substance found there, called "Sand Star," causes the animals to turn into humanoid beings called "Animal Girls"! These new creatures spend every day peacefully with the zoo's visitors... but after some time, a lost child turns up in the park. The child's attempt to find the way home turns into a great adventure with the Animal Girls!

Source: crunchyroll

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Sequel: Kemono Friends 2
Side story: Uma no Friends
Other: Kemono Friends x Anisama 2017 "Anisama"
Prequel: Youkoso Japari Park