User blog comment:GouenjiShuuya'123/Countdown for Galaxy!/@comment-4105472-20130424061239/@comment-3153924-20130425012300

But Grandfather/Kuroiwa came from an event because he got revived by people from the future, which means it wasn't suppose to happen. Which means this is a parallel world, and another example of a parallel world are the Shinsei Inazuma Japan in the InaDan movie.