Oversummoned, Overpowered, and Over It! (Manga) Volume 5 by Saitosa

The bloodbath continues. The Kingdom of the Rising Sun is plunged into a waking nightmare as the layabout wretch himself lays waste to his old hosts. The halls will run red with blood and the walls will tell tale of gruesome slaughter before Inori finishes taking out the trash. There’s just one thing standing between him and absolute freedom—Aegiana Itze, captain of the knights. On her shoulders rests the burden of an entire nation, and ultimately, its fate falls to her.

Screams echo in the night. Terror reigns. The dead stir... And sunrise is a long way off.