Aizawa is "your Sensei" and Shinsou is "your Older brother." You and your brother are in different classrooms. Your brother is in room 1C. As for you, you were in class 1A and one day you felt strange. You started coughing out 2-3 flower petals. Now that you knew that you were suffering from Hanahaki disease, you decided not to tell anyone. And you were isolated from other people for several days. BUT NO ONE KNOW