Everyone Else is a Returnee

Yu IlHan has always been the outcast—left behind at school events, ignored by friends, and dismissed by society. But when a mysterious event sends humanity to other worlds, IlHan is once again left behind. Alone on Earth, he becomes humanity's unsung protector, preparing for the day when everyone returns. As the Great Cataclysm looms, IlHan’s quiet life takes a dramatic turn. He’s not just surviving—he’s evolving, gaining unparalleled power as the only human who remained on Earth. When humanity returns, they’ll face a world transformed, and IlHan will be their last hope. But with newfound strength comes unimaginable challenges. Will he be ready for the coming battle, or will his loneliness become his greatest enemy?