Kyokugen Dasshutsu 9-jikan 9-nin 9 no Tobira: Alterna

A group of nine individuals, including Junpei, is taken against their will onto a cruise ship similar in design to the RMS Titanic. The ship is sinking, and the captives must play the “Nonary Game,” a lethal challenge involving numbered wristbands and explosive devices implanted in their bodies. If they fail to follow the game’s rules, the bombs will detonate. The participants must solve puzzles, explore the ship, and find a way to escape before the vessel sinks in nine hours. Throughout the game, they also seek to uncover the reason behind their abduction.