Geonho Kim already saved the world. As the last man standing after preventing the apocalypse, he’s ready to pass on and greet his old comrades in the afterlife. But destroying a hero’s enhanced body isn’t so easy, and Geonho’s been sent back to his own timeline where he’s still 19, shy, awkward, and hopelessly in love with his classmate, Haejeong. There are 100 days before Geonho’s meant to die—it’d be a shame if he found something to live for.