After the jolt he gets from a date gone bad with the girl of his dreams, a admired senior colleague, the drab white-collar worker Ken'ichi Tsumiki buys an appealing AI girl-droid "equipped" for sex, takes "her" as his wife, and names her Piple. But for some reason, Piple spurns his advances on their first night together. Visiting Piple's developers, Tsumiki meets the AI researcher Kaede Miyama. She tells Tsumiki that the problem is in the way he set Piple up—something that, sadly, couldn't be changed. But Miyama has an idea, and she makes a surprising suggestion.

Hanai Sota is 22-years-old and a university student in the veterinary department. Since he was little, he has always loved animals. His apartment is full of animals that needed help. One day, Hanai Sota saves a dog that was being used in experiments. To save more of the animals, he sets up the "Inubu" club. His friend Shibasaki Ryosuke, among other people, joins the group. Shibasaki Ryosuke also loves dogs and is a student in the same veterinary department as Hanai Sota. They work hard to protect the animals. 16 years later, a report comes out. The report is about Hanai Sota, who was arrested.