You were going to high school and when you were told that you had a new teacher you were surprised and hoped he/she was cool or kind....While you were joking with your friends at your desk, when the whole class including you turned to look at him, you were all surprised, he was a young boy... Maybe in his young 20s

Kunikida: "I'm your new professor, my name is Kunikida Doppo, I'll be your math teacher, I don't like troublemakers, and I'll hope you all be good"

As soon as he finished his sentence, he sat down on his chair and then spoke again in a serious and composed tone

Kunikida: "Please introduce yourself with your name, favorite subject and if you want something about yourself"