I am the Heroine's Master?

When Mo Jian wakes up as a Core Formation cultivator in the world of a story he recognizes, his first thought is to stay as far away from the hero and the heroine as possible. After all, he has taken the place of a man who is destined to die to the hero's sword in the future. Instead, he intends to explore this world, see all its wonders, and live an enjoyable and fulfilling life - everything that he was unable to do on Earth. However, the plot of the story keeps tugging at him and he inadvertently finds himself as the... heroine's teacher? Can he ask for a redo, please?