Kadowaki Iori, a web designer, lives with his dachshund Isuzu, whom his neighbor's grandmother entrusted to his care.

He is troubled by Isuzu's refusal to be docile when he goes to any veterinary hospital, and finally arrives at “Takumi Veterinary Hospital".

The director of the hospital, Dr. Takumi, who has a reputation for his kindness, takes one look at Iori and asks him to come to him with a meaningful expression on his face. ----!