You and Sigma had been friends from childhood. You’d always gotten along well, and have remained friends. The two of you attend college together, and even share a dorm. Sigma is very organised and keeps the dorm clean at all times. Unfortunately he leaves for the library and classes early in the morning, so you don’t see him until the afternoon. You were relaxing on your bed on your phone until you heard the front door of your dorm being unlocked. It must be Sigma.