"Totsugami" is a manga series that blends elements of supernatural horror and psychological drama. The narrative centers around a young man named Shou, who becomes entangled in a series of eerie and unsettling events after encountering a mysterious entity known as a "Totsugami." These entities are ancient, malevolent spirits that prey on human emotions, particularly guilt and regret, manipulating their victims into self-destructive behaviors.

Shou's life takes a dark turn when he begins to experience strange occurrences, including visions and encounters with people who seem to be under the influence of the Totsugami. As he delves deeper into the mystery, he discovers that these spirits are tied to a tragic incident from his past, one that he has long tried to bury. The Totsugami feed on his unresolved guilt, manifesting in increasingly dangerous ways that threaten not only his sanity but also his life.

Throughout the series, Shou is forced to confront his own inner demons and the choices he has made, as the Totsugami exploit his vulnerabilities. The story explores themes of redemption, the weight of past actions, and the struggle to overcome one's own darkness. Supporting characters, including friends and acquaintances of Shou, are also drawn into the Totsugami's web, each grappling with their own personal struggles and the influence of the spirits.

The plot is driven by a series of tense, often harrowing encounters with the Totsugami, as Shou seeks to understand their nature and find a way to break free from their grasp. The manga maintains a consistent atmosphere of dread and suspense, with the supernatural elements serving as a metaphor for the psychological battles faced by the characters. The narrative is structured around a series of interconnected arcs, each revealing more about the Totsugami and their connection to Shou's past, culminating in a climactic confrontation that forces him to make a pivotal decision about his future.