Everyone Else is A Returnee Manhwa: Yu Illhan was always the one left behind. Left out of cliques in school. Left out of social invitations. Just…always left out. Except now he’s been left behind for real. When Earth’s future is threatened, Yu Illhan stays behind while the rest of the population flees to other planets for safety. It’s up to Yu Illhan to save our planet before it’s too late!