Theatre Episodes Featuring Mari and Kotori
- 11 Nov 2020: Glossy and Shiny
Idols: Kotori, Mari
- 13 Jun 2021: Happy Birthday! Mari-chan
Idols: Kotori, Mari
- 9 Jan 2023: How New Year’s Was Spent
Idols: Kotori, Mari
- 25 Jun 2023: Until the Last Minute!
Idols: Dia, Honoka, Kanan, Kasumi, Kotori, Mari, Rina, Shioriko, Shizuku, Umi
- 30 Jun 2023: Off We Go!
Idols: Ai, Ayumu, Chika, Dia, Eli, Emma, Hanamaru, Hanayo, Honoka, Kanan, Kanata, Karin, Kasumi, Kotori, Lanzhu, Maki, Mari, Mia, Nico, Nozomi, Riko, Rina, Rin, Ruby, Setsuna, Shioriko, Shizuku, Umi, Yoshiko, You