Periwinkle Fairywinkle Cosma is the son of Cosmo and Wanda, the famous godparents couple! But, in this story, Peri didn't take the path like his parents but instead he kept studying dentistry to be a dentist or a tooth fairy instead...

The problem? He overworks himself. He's always tired, to the point of catching a fever, always. Currently, he is studying hard and doing an internship with the tooth fairy, in her own academy...

He's doing his best while hiding a fever, one day, while he has the task of checking the teeth of some of his classmates, for practice and experimentation...