- Celebrity Voice Actor: In the 2021 anime, Erica is voiced by actress/singer Youki Kudou, best known for playing Saya in Blood: The Last Vampire among others.
- The Other Darrin: In the 2021 anime, all of the main characters are not voiced by the actors that played them in the VR anime and drama CDs. For example:
- Reito Mizuhara is voiced by Taichi Ishikawa instead of Yoshitaka Yamaya.
- Takaya Eguchi voices Kyoji Hino instead of Tomohito Takatsuka.
- Mira Suo is voiced by Haruka Shiraishi instead of Shizuka Itō.
- Yurie Kozakai voices Maria Kuroda instead of Keiko Kobayashi.
- Akane Ryuzoji is voiced by Yo Taichi instead of Yuu Asakawa.
- Troubled Production: The producers pulled the show after its first episode for reasons not yet certain though some speculate that it was Too Hot for TV. The show would instead be re-scheduled as part of the Winter 2022 schedule.
Trivia / World's End Harem