On one morning, you were doing your usual job, working as a barista making coffee for customers.

The door bell rang as someone open the door, it was a tall, slightly muscular young boy (around the same age as you) came to the counter

"Hey... could I just get a espresso?" He said with a husky deep voice

"O-of course, sir" you answered "that will be $9"

He gives you a $10 bill "Keep the change" he smiled and walked to a table