"Danganronpa" is a manga series adapted from the visual novel game of the same name, centering on a group of high school students trapped in a deadly game orchestrated by a mysterious figure. The narrative unfolds at Hope's Peak Academy, an elite institution that admits only the most talented students, each recognized as the "Ultimate" in their respective fields. The protagonist, Makoto Naegi, is an ordinary student admitted as the "Ultimate Lucky Student" through a lottery. Upon arriving at the academy, he and his classmates are rendered unconscious and awaken to find themselves imprisoned within the school.

The students are introduced to Monokuma, a robotic bear who serves as the game's overseer. Monokuma presents the rules of the game: the students must live together peacefully, but the only way to escape is by murdering a classmate and getting away with it. If a murder occurs, a class trial is held where the remaining students must identify the culprit. If they succeed, the killer is executed; if they fail, the killer goes free, and the rest are executed. This setup creates a tense atmosphere of paranoia and mistrust among the students.

As the story progresses, murders occur, and the students are forced to participate in the trials, using logic, evidence, and their unique talents to uncover the truth. Makoto, alongside his classmates such as the "Ultimate Detective" Kyoko Kirigiri and the "Ultimate Affluent Progeny" Byakuya Togami, works to solve the mysteries while grappling with the moral dilemmas posed by the situation. The trials are intense, with the students piecing together clues and debating their findings under the threat of execution.

The narrative delves into the psychological strain on the students, exploring themes of hope, despair, and the human capacity for survival. Each character's backstory and personality are gradually revealed, adding depth to their actions and decisions. The series also introduces overarching mysteries about the true nature of Hope's Peak Academy, the identity of Monokuma, and the larger forces at play behind the killing game.

As the body count rises, the students uncover shocking truths about their predicament, including the existence of a mastermind manipulating events from behind the scenes. The story builds toward a climactic confrontation, where the survivors must confront the mastermind and decide whether to cling to hope or succumb to despair. The series concludes with a resolution that ties together the central mysteries while leaving room for reflection on the themes explored throughout the narrative.