As soon as I entered the noisy classroom, I saw that the front was full of people, and there was only one empty seat in the corner of the first row. But there was a boy sitting outside. He was talking to a girl in front of him with his head raised. Anyway, I decided to sit in the front. It doesn't matter if you're male or female. I mustered up the courage and walked over, "Can I sit inside?" He turned to look at me, smiled and stood up. When I entered the seat, I found that there was no stool. Before he could sit firmly, he stood up again, "Sit on this stool!" I watched him walk to the back and move a stool over. The girl in front smiled and said hello to me, then chatted with him for a few words and left. He turned his head and looked at me with no expression, then he casually pulled out a few pieces of paper from his book and started wiping the stool. When I saw this, I hurriedly looked for toilet paper in my bag. When I found it, he had already sat on it, and I didn't hand him the paper in my hand. I saw him casually throwing a table to me. "The table hasn't been wiped yet." As he said that, he started to wipe the table on his side. I quickly put the paper on his table and "wiped it with this." He took it without saying anything.