The 13th-Gen Members make their Debut. Divided into groups, the Members go to school to solve and challenge it's 'Mystery Trials'.

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Main Cast: Mizuki Fukumura, Erina Ikuta, Haruna Iikubo, Ayumi Ishida, Haruka Kudo, Sakura Oda, Haruna Ogata, Miki Nonaka, Maria Makino, Akane Haga

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