The Rising of the Shield Hero is a Japanese light novel series written by Aneko Yusagi, set in a dark fantasy and isekai world. The story centers around Naofumi Iwatani, an ordinary Japanese youth who, along with three other young men from different worlds, is summoned to a parallel universe to become one of the world's Cardinal Heroes. Each hero is granted a legendary weapon, with Naofumi receiving the Legendary Shield, which designates him as the Shield Hero. Unlike the other heroes who receive offensive weapons, Naofumi's shield is purely defensive. His journey takes a dark turn when he is falsely accused of sexual assault by the kingdom's princess, resulting in his abandonment and ostracization. Struggling to survive alone, he purchases a demi-human slave named Raphtalia and an egg that hatches into a bird-like creature named Filo, who become his loyal companions and help him grow stronger.

The series explores themes of betrayal, resilience, and redemption as Naofumi works to clear his name and fulfill his role as a hero. Despite the initial hostility and prejudice he faces, Naofumi gradually gains the trust and admiration of the people through his courageous actions and steadfast dedication. Alongside Raphtalia and Filo, he battles the Waves of destructive monsters threatening the world, uncovering deeper conspiracies and the true nature of their summoning. The narrative combines intense action, emotional depth, and intricate character development, making The Rising of the Shield Hero a compelling tale of overcoming adversity and forging one's destiny in a hostile world.