Tottori Kenichi is a very strict and gifted veterinarian nicknamed 'Dolittle'. He directs his own animal clinic, helps not only animals but also their owners, and believes that 'pet care means business'. Tajima Asuka is the animal nurse working with Kenichi. A love triangle starts between those two and Dolittle's highly competent rival Hanabishi Masaru who also owns his own animal clinic and has a completely opposite personality plus a whole different perspective about animal care.
One arrogant doctor with astonishing skills and speed, but has his own rules for handling cases. Because of his ambitions and everyone's prejudices, he will encounter many obstacles. But after becoming the last hope of his patients, the most difficult cases will go through his hands. The difference is that in Iryuu the patients are humans, while in Veterinarian Dolittle, the patients are animals.