Homeless Miyu Samura's dog is annoying the neighbours by barking when he is out at work at night - and he is being threatened with eviction. While walking the dog, he loses control of it, but it is saved from being run over by Shinichiro Niwa, who turns out to be a dog trainer. In order to pay off his debt to Shinichiro, Miyu quits his dead-end job to work for him while learning to become a dog trainer himself.