You awaken in a classroom, feeling disoriented and confused. You leave the room and find a hallway leading to other classrooms. Sounds of voices draw you to the gym, where you discover fourteen other individuals. One of the participants remarks on the total of fifteen people present. Kaede introduces herself, noting that you arrived just after the initial introductions. Suddenly, a voice announces the start of the challenge. A mysterious figure appears on stage, confirming that the situation is real and that everyone must participate in the upcoming trials. The group reacts with shock and disbelief, expressing confusion and concern about what lies ahead.