The official website of Cygames and Studio Gokumi’s original anime has released the main promotional video, showcasing a July 1, 2025, release date.
The video also features the opening theme song “Kakushouron” by VTuber Ryushen and the ending theme song “PANDORA feat. Noa (from Colorful Peach)” by Vell.

The site also unveiled a new key visual.

New key visual of Necronomico and the Cosmic Horror Show

Finally, the site announced four new cast members and shared their characters’ visuals.

New Cast Members:

  • Iwami Manaka (who also voices Mayusaka Mayu) as Cthulhu
Character visuals of Cthulhu and Mayusaka Mayu, voiced by Iwami Manaka
  • Okitsu Kazuyuki as Hastur
Character visual of Hastur, voiced by Okitsu Kazuyuki
  • Konishi Katsuyuki as Ghatanothoa
Character visual of Ghatanothoa, voiced by Konishi Katsuyuki
  • Itou Ayasa as Cthugha
Character visual of Cthugha, voiced by Itou Ayasa

Alongside the cast announcement, the site also revealed that two of the anime’s characters, Zhar and Lloigor, will debut as VTubers today, June 1.

Character visual of Zhar
Character visual of Lloigor
Debut stream announcement