After eating chocolate handed to him by the eccentric Inari Sakahira, a high school student whose name the story never gives wakes up transformed into an Akita Inu puppy. He is picked up by Karen Inukai, the cool, unreadable classmate he has a crush on, who names him Pochita and showers her new pet with an open affection she never shows at school. Trapped in a dog's body with his memories and feelings intact, he navigates life as Karen's pampered and increasingly conflicted household dog.