Rebirth, Crying Music Professor at the Beginning

"Can breath do this? It's all wrong!" "The cavity has no support at all, how can it resonate?" "Who did you learn this vocal music from? Why is it so bad?" "Who is your teacher? Isn't this misleading?" As soon as Lu Fan opened his eyes, he found that he had traveled through time. He is actually a vocal music teacher, and his students are being reprimanded by so-called famous professors. He also said that he misled his disciples. Who can bear this? It depends on how I teach you how to be a good person. "Ding! The system awakens, and the host can choose to swallow his anger and obtain the title of the strongest ninja." "Anger the professor, get the title of god-level teacher, and become the strongest teacher." Is this still a choice? Definitely choose b! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.