However, not everything was smooth sailing. They encountered a rival group, led by a student named Akira, who seemed determined to outdo everyone else. A series of friendly competitions ensued, pushing both groups to their limits.

Curiosity piqued, Taro, Natsumi, and Kenji decided to attend the briefing scheduled in the school auditorium. Upon arrival, they found the entire student body there, buzzing with excitement and suspicion. Akane took the stage, flanked by the council members, and revealed that the challenge was to solve a series of puzzles and riddles hidden across the school. The twist? These puzzles would require collaboration between different classes and grades, encouraging a sense of unity and healthy competition.

As they solved each puzzle, they learned more about their school's history and the mysterious benefactor who had funded these challenges. The journey was filled with laughter, disagreements, and moments of brilliance.