Mike wasn't the fastest, nor the most athletic or smartest in his class. He wasn't very popular, and not very social. So yes, he was an introvert.

He was the second smallest, and often got bullied for it. In second grade, people were ruthless, especially the fifth graders.

Mike heard a new student was coming today, but he didn't feel any excitement. They were all the same usually. He was working on his math, when the door opened.