Persona Q Shadow of the Labyrinth

The story of Persona Q: Shadow of the Labyrinth revolves around a rumor that involves the so-called "Seven Wonders of Yasogami High", a mysterious clock tower, and a labyrinth that appears out of nowhere on the school grounds, during the Yasogami Culture Festival. According to said rumors, whoever hears the sound of the tower's bell will die. The bell's chime is also heard in Tartarus by the members of SEES, who find themselves transported to Yasogami High. The only way to return the world to its original state seems to be hidden within Zen and Rei, however, both of them have lost their memories.