C622 Signal

"Ding ling ling ~"

After the bell for the end of class rang, Tang Xiaotang packed her things and followed the professor out.

When she reached the office, she looked at the old man in the seat and asked, "Whatcanan Idoforyou, sir?" "Teacher, what's the matter?"

The silver-haired old man muttered to herself for a moment as if she was hesitating