Dungeon Samurai book three, and the end. Serious spoilers ahead for the earlier two.
As in, the opening sentence talks of Hiroshi's death. Then the funeral -- the monster attack en route to the interment -- and the final burial. After talk of evolving powers, there is the council of war. The leviathan's poison ruined much of their fishing waters, and their farmland, and they are perilously short on supplies. The only hope is escape, and that means pressing through the dungeons.
It involves pouring water on dead bodies, a place where the demon can't hear, boss fights, a man losing his hand because of friendly fire, ammunition supply problems, farmers turned warrior because of the loss of farmland, and more.
An interesting twist on the ending.