This is the story of Minerva McGonagall, who was born ten years earlier and became Tom Riddle's classmate.
With both a Muggle father and a wizard mother, Minerva and Tom both experienced inner struggles and pain; while they were both poor and self-sufficient, they had a unique affinity for animals, which made Tom gradually become curious about this unique Gryffindor.
Concept: No one is born absolutely bad, and environmental factors are definitely more important than nature. When Tom meets a girl in a similar situation to his own, he may learn a lot. And in the plot, although Minerva was born ten years earlier and Tom became better, Voldemort still appeared. There are always people who want to become Voldemort, and there are always people who want to become Harry Potter. This is the objective law of historical development, and the long course of history will not be changed because of small variables.