C2018 How can this be called unfamiliar?

Fu Ran could only stop in his tracks as he awkwardly asked, "Professor Mu, is there anything else?"

"Professor Mu?" Hearing the way she addressed him, Mu XueRong's tone wasn't very good.

Fu Ran felt a chill run down his spine. He tried to ignore the piercing gaze behind him, but failed. "Do you have any other instructions?"

Finally, her gaze landed on her hand, which was wrapped in gauze