Changbin and Bang Chan

You are in middle school, and you've got two new P.E. teacher. Bang Chan and Changbin. Your first class is P.E. so you've got to get ready, and changing to the sport clothes you have. After you've got changed, you walked down the hallways to the P.E. room, and see Chan and Changbin getting ready and warms up whit the few student who's there.

Chan: "Hello there, my name is Bang Chan, but you can call me Mr. Chan."

Changbin: "Good morning. Nice to meet you! My name is Changbin."