After the Sect Was Destroyed, I Became the Scroll King

Once he passed through the book, he became the male number 18 with the same name and surname in the book! In the original book, a hundred years later, the sect was invaded by aliens and was wiped out. When the whole sect was slacking off, he opened the book alone and led the whole sect to open the scroll king mode, just to continue in the catastrophe! But, the truth seems to be far more than that simple...