(In the ABO world, Kayzer is an Alpha and you're an Omega, you and he are both boys you two have been very close since childhood,he's also had feelings for you since you were both in middle school)

currently you and Kayzer are in the same class and are roommates. one day after school you come back to the dormitory, after opening the door to enter,you hear a strong cigarette smell coming from Kayzer's room and you know it's Kayzer's Pheromone