Protect with Martial Arts

A man who had just failed the college entrance examination was drunk and unconscious. When I woke up, I found that I was back to the first day I reported to high school. And I found that the world has undergone tremendous changes. Not only is technology developing in the world, but martial arts is also constantly developing. Here, powerful warriors can conquer mountains and reclaim seas, and they can do anything. The protagonist has no system, only a little bit of the protagonist's innate advantages and continuous efforts to make himself stronger. Use this to protect the people he loves.