Phil Salembart, the lazy, womanizing son of a count, leads a double life. Under the guise of the Hero in the Shadows, he secretly uses powerful magic to rescue those in need, appearing at crisis points only to vanish without a trace. His secret identity, meant to be an enigma wrapped in darkness, is suddenly exposed to the entire town. The story begins not before but right after this disastrous reveal.

The setting is a fantasy world where noble society and monarchy coexist with magic and saintly powers. Phil scrambles desperately to deny the truth, finding the embarrassment of his heroic exposure difficult to live down. His attempts at denial are complicated as women who feel indebted to his alter ego begin flocking toward him. These include a saint, a noble's daughter, and even the kingdom's princess.

The central narrative conflict arises from the tension between Phil's public persona as a degenerate noble and the heroism he cannot fully disavow. Instead of operating from the shadows, he finds himself thrust into the spotlight, attracting unwanted attention from grateful hero-worshippers while trying to maintain his cover. The series develops through comedic situations where Phil navigates these obligations and misunderstandings. As the story progresses, the complications multiply with each new admirer who discovers his secret, forcing Phil into a role he never wanted acknowledged.