Koenji Tatsuya is a veterinarian at the Hilltop Animal Clinic in Kagurazaka, Tokyo. Just when he had quit the animal clinic where he previously worked to go back home and work at a local animal clinic, the director of the local animal clinic suddenly disappears, entrusting the clinic to Tatsuya. Although bewildered, Tatsuya makes up his mind to strive to cultivate exchanges with the animals and owners who live in Kagurazaka.