Theatre Episodes Featuring Kasumi and Dia
- 3 Jul 2020: Number One!
Idols: Dia, Kasumi
- 28 Jul 2020: Kasumin’s Perfect Plan : Day 6
Idols: Dia, Emma, Kasumi, Mari, Nozomi
- 17 Jun 2021: I've Always Wanted to Try It
Idols: Dia, Kasumi
- 20 Oct 2022: This Shouldn't Be Happening!
Idols: Dia, Kasumi
- 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