After his girlfriend Yuuko breaks up with him, Miyu Samura's luck is at an all-time low. But one day several months later, she reappears and gives Miyu a toy poodle she supposedly cannot take care of. Miyu's knowledge of dogs is nonexistent, and the puppy's rowdiness leaves him in danger of being evicted from his own home. When Miyu decides to take the puppy on a walk, he has a chance encounter with professional dog...