An authentic (style) school mystery is born here! At Kazama-kun's invitation, Shinnosuke and his friends decide to enroll in the super elite boarding school ``Private Tenka Unification Kasukabe Gakuen'', commonly known as Tenkasu Gakuen, for a week! Has Kazama-kun turned into an idiot after getting caught up in the mysterious incidents that occur frequently at the school? ! In order to uncover the truth of the incident, Shinnosuke and his friends set up the "Kasukabe Detective Club"! What did Shinnosuke and his friends discover through their stray deductions? (thetvdb.com)