Hogwarts Students

Due to an accident, a high school student traveled to Hogwarts, a place of leisure, freedom, and happiness. There was no high-pressure high school life in the previous life. There were no longer thousands of troops crossing a single-plank bridge, no more people on the playground, and no more studying purely for the sake of scores. But behind the seemingly free and happy life, there are undercurrents surging, and everything is no longer stable. Is defeating Voldemort the end? Is there any chance for the boy to return to his original world? The single heroine (who has not yet been determined) is more everyday. It is the first time the author has written it. If there are any shortcomings or errors in the plot, please point it out. The emotional line may not be well written. I apologize (the pain of being single for ten thousand years).