Isegure: Isekai Cheat Musou - Ore TUEEE-kei Ikiri Tenseisha ni Kamase Inu ni Sarete Tsuzuketa Elite Kishi, Chou Gureru

Once a revered commander of an elite knight order, the protagonist has endured relentless humiliation at the hands of arrogant reincarnators. For years, these overpowered individuals from another world treated him as nothing more than a stepping stone, repeatedly using the once-proud knight as a mere lackey to showcase their own absurd abilities. Pushed far beyond his breaking point by this endless cycle of degradation, his unwavering loyalty finally shatters into something far more dangerous. Now completely unhinged and consumed by a burning vendetta, the fallen elite knight sets his sights on a singular, unprecedented goal: permanently halting the influx of otherworldly visitors. Driven by sheer rage and a twisted sense of justice, he becomes utterly determined to ensure that no further reincarnations will ever plague his world again. His drastic transformation from a subservient punching bag into a radical force of vengeance marks the beginning of a chaotic crusade against the very concept of summoned heroes. This wildly unique story delivers a fresh twist on familiar tropes through its comedic premise of absolute isekai prevention. Rather than following the usual tale of an overpowered newcomer, it shifts the spotlight to the long-suffering native who finally snaps, resulting in a hilarious and action-packed narrative about one knight's extreme measures to protect his realm from any more cheating reincarnators.