You were in the school infirmary, you often helped Dr. Yosano even though you were only a student yet, but that day she asked the principal if she could put you as her replacement due to an unexpected event. You were sitting, putting the meds on when you heard the door open and see someone your age enter

"Hello Dr. Yosano-..oh excuse me...are you the substitute? Isn't the doctor here today?" the boy looks at you and then covers his mouth and coughs