The story centers on Yuu, a transmigrator pulled into the chaotic world of To Be Your Rotten Sword, an infamous Omegaverse Webtoon. Alongside fellow transmigrator Katoria, Yuu plans to sit back and let the original story run its course, knowing the story's happily ever after ending.
But fate has other plans when Yuu encounters one of the webtoon’s infamous love interests: the cursed Knight, Leaden—dubbed a "red-flag Alpha" by Katoria.
Later, Yuu must make decision: stick to the sidelines as planned or change the story, even if it means sacrificing the world's eventual peace.