Leo, a god of death, has been sent to save human souls at a small hospice called Okanoue Hospital. For this mission, he's been granted a special form: one with four legs, a tail, and a keen sense of smell. Thanks to his canine assets, Leo can seek out patients at the hospice who are plagued by a lifetime of regret. With his endearingly wet nose and friendly, furry appearance, Leo eases patients into their next life, seeing them off from the quiet hillside hospital without the burden of lingering remorse.