"Shinkokyō no Hitsuyō the Comic" is a manga adaptation of the light novel series of the same name, written by Yūsura Kankitsu and illustrated by Shigure Ui. The story is set in a world where humanity faces constant threats from mysterious entities known as "Phantoms," which manifest from human fears and negative emotions. To combat these threats, specialized individuals called "Phantom Slayers" are trained to protect society.

The protagonist, Kujō Shinkokyō, is a young man who possesses a unique ability to see and interact with Phantoms, a trait that sets him apart from others. Despite his potential, Shinkokyō is initially reluctant to embrace his role as a Phantom Slayer due to the inherent dangers and his own personal fears. However, after a traumatic encounter with a powerful Phantom that threatens those he cares about, he resolves to confront his fears and harness his abilities to protect others.

Shinkokyō joins an organization dedicated to training and deploying Phantom Slayers, where he meets a diverse cast of characters, each with their own motivations and struggles. Among them is Aoi Hoshizora, a determined and skilled Phantom Slayer who becomes a close ally and confidante. Their relationship evolves as they face increasingly dangerous Phantoms, uncovering deeper mysteries about the origins of these entities and the true nature of their powers.

The narrative explores themes of fear, courage, and the human condition, delving into the psychological and emotional toll of battling Phantoms. As Shinkokyō and his comrades grow stronger, they uncover a larger conspiracy involving the organization they serve, raising questions about the ethics of their mission and the sacrifices required to maintain peace. The story balances intense action sequences with moments of introspection, creating a compelling blend of supernatural conflict and character-driven drama.