Oversummoned, Overpowered, and Over It! (Manga) Volume 4 by Saitosa

A day of celebration ends in blood, and with the falling of the sun, an era comes to an end. In a matter of seconds, heroes are made villains, villains are made heroes, and morality blurs as the future writers of history make their bids for power. Among all these players, and unbeknownst to the rebel movement, is Inori. No one knows just how much of a threat one layabout can be, and it just so happens that this one is more than capable of tipping the scales however he’d like. The only question is which side serves his interests the most—and whether a certain princess-made-fugitive has the strength to weather tragedy.

In a battle for the greater good, only the strongest will see the sun rise again.