Theatre Episodes Featuring Dia and Umi
- 15 Mar 2020: Happy Birthday, Umi!
Idols: Dia, Umi
- 28 Sep 2020: Dear You - Part 7
Idols: Dia, Karin, Umi
- 1 Jun 2021: Merits Behind the Rainy Season
Idols: Dia, Umi
- 18 Sep 2021: First Things First....?
Idols: Dia, Rin, Umi
- 10 Oct 2022: How to Motivate Someone?
Idols: Dia, Umi
- 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