Is there a book where the main character makes an irreversible mistake and ends up in constant pain and depression for the rest of his life and he is certain that he would give anything to go back in time and change things?
One day, while begging God to take him back to the past, his wish is granted, or somebody put him in a time machine etc, simply finding a way out to go back. When he is sent back, he avoids making the same mistake, and his future life turns out just as he wanted.
by md28trkye