"Hells" is a supernatural anime series that explores themes of redemption, morality, and the afterlife. The story centers on Amagane Rinne, a teenage girl who dies in a tragic accident and finds herself in Hell. Instead of being condemned to eternal punishment, Rinne is given a chance to atone for her sins by working as a guide for newly arrived souls. She is assigned to the Hell Correspondence Office, a bureaucratic institution that processes the damned and assigns them to various levels of Hell based on their sins.

Rinne's journey is intertwined with the lives of other characters, including Okouchi, her cynical and pragmatic supervisor, and Hilda, a demon who serves as her mentor. As Rinne navigates the complexities of Hell's hierarchy, she encounters a diverse array of souls, each with their own stories and struggles. The series delves into the moral ambiguities of sin and punishment, often blurring the lines between good and evil. Rinne's compassion and determination to help others, even in the face of Hell's harsh realities, drive much of the narrative.

The plot is structured around episodic arcs, with each episode focusing on a specific soul or group of souls that Rinne must assist. These arcs explore various aspects of human nature, from greed and betrayal to love and sacrifice. Over time, Rinne's role evolves, and she begins to uncover deeper truths about the nature of Hell and her own past. The series also introduces overarching mysteries, such as the true purpose of the Hell Correspondence Office and the enigmatic figure known as the "King of Hell."

The setting of Hell is depicted as a vast, labyrinthine realm divided into multiple layers, each with its own distinct environment and inhabitants. The series combines elements of dark fantasy and psychological drama, creating a world that is both fantastical and deeply introspective. The characters are multifaceted, with their own motivations and moral dilemmas, adding depth to the narrative.

Overall, "Hells" presents a thought-provoking exploration of the afterlife, emphasizing the complexities of human behavior and the possibility of redemption, even in the most unlikely of places. The series balances its darker themes with moments of humor and humanity, making it a compelling watch for fans of supernatural and philosophical storytelling.