Persona Q: Shadow of the Labyrinth - Roundabout

On the final day of Yasogami High's culture festival, a peculiar bell tower materializes on the school grounds. The characters from Persona 4 witness this occurrence, while the Persona 3 characters hear the bell and are transported forward in time to where the Persona 4 group is. Both groups find themselves trapped in the school, which is overrun by Shadows. They encounter two enigmatic figures, Zen and Rei, who are unable to recall their pasts. As the story progresses, it becomes apparent that uncovering Zen and Rei's lost memories might be essential to understanding why the bell tower appeared.