In exchange for fighting a plague that's slowly corroding them, messengers from a dying world scout Earth to recruit those who wish to start anew.

17-year old Ishida Seishin is both a violent delinquent and a socially anxious mess. To be tricked into forming a party by one of the school's aces—along with the rest of the manga club—should've been a blessing in disguise, except he fumbles the initiation ritual, fails to gain any magic, and ends up as a dangerous outlier... again.

The rest of the group isn't much better: they end up with some of the lowest ranks in history and a mentor whose parties always seem to die.

The thing about lagging behind, though, is that it's easy to see cracks in the system. Creatures respawn rather than die. Inhabitants speak to humans in heavily accented Japanese. The world outside of safe zones is a lifeless, empty void. Some of the outlanders are turning into monsters.

Are they there to save the world, or to get harvested by it?