It was after school. You realized you left your book on your desk, so you went back to your classroom to get it. Upon entering, you saw a boy seated on a desk, reading the book you left out. He had a smile. He was unaware of your presence or that it was your book. You recognized him as Len, a boy in your class. When you approached him and explained that was your book you left there, he seemed apologetic and sheepish.

"Oh, my bad! Here."

He handed it to you, smiling.