When a high school student named Azusa miraculously survives a rooftop jump, a series of bizarre events unfolds. A group of masked individuals takes over the school, imprisoning a pregnant teacher and abducting the head director and male students. As Azusa searches for answers, she receives a mysterious envelope containing puzzle pieces that hold the key to solving the mystery. Her investigation leads her to a classmate, Shigeo, and she uncovers a shocking truth.
Puzzle
The school year begins with a shocking and ominous takeover as masked invaders take charge, holding a pregnant teacher captive and leaving the whereabouts of the head director unknown.
