For the sake of the one he loves, the man becomes evil.
The Seven Wonders of the Academy, the Nightmare School Festival… .

The season is fall.
At Kamome Academy, a school festival called the Tenchu ​​Festival is held.
While Nene and her friends were busy preparing, there were those who were after the first of the Seven Wonders, the Divine Water of the Clockkeeper.
The school festival, which should have been fun, has turned into an absurd situation… .
The Seven Wonders of the Academy, School Festival Edition, begins!