"Ore Dake Fugū Skill no Isekai Shōkan Hangyakuki" centers on a protagonist who is summoned to a fantasy world alongside classmates, only to discover that he possesses a seemingly useless skill called "Appraisal." While others are granted powerful abilities suited for combat or magic, his skill is dismissed as insignificant. However, the protagonist soon realizes that "Appraisal" allows him to uncover hidden information about people, objects, and the world itself, giving him a unique advantage.

The story unfolds as the protagonist is betrayed by his classmates and the kingdom that summoned them, who view him as expendable due to his perceived lack of combat prowess. Left to fend for himself, he uses his "Appraisal" skill to navigate the dangerous world, uncovering secrets and forming alliances with individuals who are also marginalized or oppressed. His journey becomes one of survival, rebellion, and uncovering the truth behind the summoning and the kingdom's motives.

Key characters include the protagonist, whose resourcefulness and strategic thinking drive the narrative, and a diverse cast of allies he encounters, each with their own struggles and abilities. The kingdom and its representatives serve as primary antagonists, exploiting the summoned individuals for their own gain while maintaining a facade of benevolence. The plot explores themes of betrayal, resilience, and the subversion of expectations, as the protagonist turns his seemingly weak skill into a powerful tool for survival and resistance. The narrative balances action, strategy, and world-building, creating a story that emphasizes intellect and adaptability over brute strength.