Two years after the Danganronpa television show concluded, and one year following the events of Danganronpa: LIVe or Die, the survivors of multiple seasons gather for a large-scale reunion. Before anyone can settle in, sleeping gas is released, and sixteen attendees are abducted and dropped into a new killing game on a deserted island. What the organizers failed to account for — and what the abductees themselves only piece together later — is that every single person at that reunion won their season by committing a murder and getting away with it. Everyone on the island is already a killer.