Class of Brains is a dark horror manga set within a seemingly normal school that quickly descends into a disturbing and surreal nightmare, following a group of students who become trapped in a series of grotesque and unexplainable events involving disembodied brains, twisted experiments, and horrifying transformations that challenge their sanity and blur the line between life and death as they struggle to survive and uncover the truth behind the madness consuming their classroom.

As the story progresses, it unfolds through intense and unsettling scenarios filled with psychological tension, shocking imagery, and unpredictable twists, exploring themes of fear, control, identity, and the fragility of the human mind, while maintaining a claustrophobic and oppressive atmosphere that keeps readers constantly on edge. Blending psychological horror, body horror, and dark mystery elements, the series appeals to fans of creepy and freaky manga, gaining attention for its bizarre concept, disturbing tone, and its ability to create a lasting sense of discomfort, also known as Class of Brains manga, school horror manga, brain horror series, psychological horror manga, and grotesque classroom manga.