"Good morning, teacher!"
"It's getting late. If you want to sleep, go home and go to sleep."
"Good morning, teacher!"
"I wonder if this is the only opening line you have?"
"Good morning, teacher!"
...
"Oh, teacher, did you touch my head? Really? Hahaha, I'm so happy!"
Many years later,
"Why don't you say good morning to me again, teacher?"
...
"In this case, let me say it to you every day. Good morning, Awan."