- 7ORDER - boy group consisting of seven members. Kentaro Yasui (Ramuda's stage actor) and Alan Abe (Samatoki's stage actor) are both main vocalists
- Soma Saito - solo project of Gentaro's voice actor
- Bimi - solo project by Ryota Hirono (Kuko's stage actor)
- まっきーとけんた - romanized: "Mackey and Kenta." music duo between Yoshihiko Aramaki (Sasara's stage actor) and Kenta Mizue (Jyuto's stage actor)
- 高野洸 - "Akira Takano," solo project of Ichiro's stage actor
- ZIPANG OPERA - boy group/band consisting of four members. Yuu Fukuzawa (Seigen Arima's stage actor - from Track 5) is a member.
- project -asA- - solo project of Kenta Mizue (Jyuto's stage actor)
- okano_skywalker - solo project of Kaito Okano (Rindo Akune's stage actor - from Track 5)
- Asanuma Shintaro (Samatoki's voice actor) voiced Itaru Chigasaki from A3! - music, anime, game
- Kenta Mizue (Jyuto's stage actor) played Banri Settsu from the A3! stage play
aug 5 2023 ∞
feb 21 2024 +