" I recommend " Teacher Dad in the City " to you. The story is about the iron-blooded instructor, Heavenly King Qin, betraying the mysterious organization, Tian Fa, for his wife and daughter. He began a passionate and interesting life of loving his wife and protecting his daughter. He was hunted down by Tian Fa, but he was still fearless. The main character is called the instructor, which matches the information you provided. I hope you will like this novel.😘