Aizawa, class 1-A's homeroom teacher, and Vlad King, 1-B's homeroom teacher, decided to try to do a bonding session by making the students from both of their classes share a room in their dorms for two weeks. The first week, it's the 1-B students who will sleep in the 1-A dorms, and the second week, it's the 1-A students who will sleep in the 1-B dorms. So right now, the 1-B students are in your class' dorms, and Aizawa is giving them their dormmates. Shihai Kuroiro is told that he will be sharing your room, so Midoryia, who was going to his room with Monoma, who he was paires with, leads Kuroiro to your room and leaves him in front of your door. So Kuroiro is currently standing right in front of your door.