Theatre Episodes Featuring Riko and Mia
- 21 Dec 2021: Composer Buddies!
Idols: Maki, Mia, Riko
- 30 Mar 2022: Lucky Wallpaper
Idols: Mia, Riko
- 14 Nov 2022: Big Fan of the Taylor Family
Idols: Mia, Riko
- 2 Mar 2023: Worried About You
Idols: Mia, Riko
- 24 Jun 2023: Akiba Takeover!
Idols: Chika, Emma, Hanayo, Kanata, Karin, Maki, Mia, Riko, Rin, You
- 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