The boy was taught buy his parents how to make lots of ancient things but not told why. He also took martial arts
One day his parents did not go with him as he drove but put lots of the items he made in the car with him. They told him go. He has an accident and wakes up hundreds of years ago. He helps save some women then met a good emperor and help change history. When he woke up the present looks like it might be like 2200 because now there is space travel thanks to his spreading peace instead of wars. I want to read it again. Can anyone help me find this story.
Teen with sex but story was great
