Yuusha ni Minna Netoraretakedo Akiramezu ni Tatakaou: Kitto Saigo wa Ore ga Katsu
The Demon Lord’s army attacks the capital. The Yuusha, drunk on his harem, has grown lazy. His skills have atrophied. The companions realize that the Yuusha’s "Holy Sword" is a crutch. When the vanguard falls, a single figure appears on the battlefield. It’s the MC. Not for revenge. Not for glory. He says: "The Demon Lord will destroy the world. I live in this world. Move, or die." yuusha ni minna netoraretakedo akiramezu ni tatakao
The story is a quintessential example of the "Zamaa" subgenre popular on Shosetsuka ni Naro, where the focus is on the emotional buildup of being wronged followed by a cathartic "reversal" or "payback". Yuusha ni Minna Netoraretakedo Akiramezu ni Tatakaou: Kitto
The genius of this sentence is the word "Akiramezu" (Not giving up). It implies that the protagonist wanted to give up. Every morning he wakes up, he wants to throw his sword into the river and lie down. Every night, he dreams of the laughter of his former companions as they walk away with the Hero. The companions realize that the Yuusha’s "Holy Sword"
A reviewer on Facebook highlighted the emotional weight of the betrayals: