"KamiErabi GOD.app" is a 12-episode anime series that blends elements of supernatural action, psychological drama, and dark fantasy. The narrative centers around a mysterious mobile application called "GOD.app," which grants its users extraordinary powers but at a deadly cost. The story unfolds in a world where a group of high school students is suddenly thrust into a life-or-death game orchestrated by the app. Each participant is given a unique ability, ranging from manipulation of time to control over elements, and must use these powers to eliminate others in a battle royale-style competition. The ultimate goal is to become the last survivor, who will be granted a single wish by the app's enigmatic creator.

The protagonist, Riku Kudō, is an ordinary high school student who becomes entangled in the game after downloading the app. Initially reluctant to participate, Riku is forced to confront the harsh reality of the competition when his classmates and friends begin to turn against each other. As the game progresses, alliances are formed and broken, and the moral boundaries of the characters are tested. Riku's journey is marked by his struggle to retain his humanity while navigating the increasingly brutal and manipulative tactics employed by other players.

Key characters include Aoi Hoshizaki, a childhood friend of Riku who becomes a formidable opponent, and Shōgo Sena, a cunning and ruthless participant who views the game as an opportunity to reshape the world according to his ideals. The series also introduces a mysterious figure known only as "God," who oversees the game and provides cryptic guidance to the players. The interactions between the characters are driven by their conflicting motivations, ranging from survival and revenge to a desire for power and control.

The plot is structured around escalating conflicts and revelations about the true nature of the GOD.app. As the body count rises, the survivors uncover clues about the app's origins and the identity of its creator, leading to a climactic confrontation in the final episodes. Themes of free will, morality, and the consequences of unchecked ambition are explored through the characters' choices and the unfolding narrative. The series concludes with a resolution that ties together the central mysteries while leaving room for interpretation regarding the broader implications of the game.