Morning Musume.'17 DVD Magazine Vol.91
The 13th-Gen Members make their Debut. Divided into groups, the Members go to school to solve and challenge it's 'Mystery Trials'.
- Year: 2017
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- Cast: Mizuki Fukumura, Erina Ikuta, Haruna Iikubo, Ayumi Ishida, Haruka Kudo, Sakura Oda