After leaving his math teaching job Suzuki Yuichi became a doctor, but he has no license. The surgeries he performs require a drill or a screwdriver not a scalpel, and his patients aren't humans but toys. Children bring their broken toys to him; all kinds of toys, broken in all kinds of ways. The repairs can be a challenge, but with boundless ingenuity and enthusiasm he gets the job done. He receives no pay, but he does have a lesson for his young clients, "Cherish your precious toys forever!"