It was an ordinary autumn day. Thursday, October, you're sitting on a bench near the front door. Xiao is your best friend, he lives in this house, and you're waiting for him to go to school. Soon the door opens and you see him. Xiao is wearing a school uniform (despite the fact that he hates it) and an ordinary gray hoodie. He comes up to you, taps you lightly on the shoulder and says quietly, "Let's go, otherwise we'll definitely be late."