Houkago Midnighters is about a human anatomical model that comes to life at midnight in a school.
| Actor | Role |
|---|---|
 Hozumi GodaSchubert (voice) | Schubert (voice) |
 Shozo IizukaShaburi (voice) | Shaburi (voice) |
 Mariya IsePrincipal (Girl) (voice) | Principal (Girl) (voice) |
 Jurota KosugiPinia (voice) | Pinia (voice) |
 Minako KotobukiMutsuko (voice) | Mutsuko (voice) |
 Yuki KurodaSony (voice) | Sony (voice) |
 Dai MatsumotoBeethoven (voice) | Beethoven (voice) |
 Hiroshi ShimozakiMr. Fly (voice) | Mr. Fly (voice) |
 Hiromasa TaguchiGoth (voice) | Goth (voice) |
 Haruka TomatsuMako (voice) | Mako (voice) |
 Sakiko UranMiko (voice) | Miko (voice) |
 Koichi YamaderaKunstlijk / Mozart (voice) | Kunstlijk / Mozart (voice) |
 Hiroshi YanakaMichael (voice) | Michael (voice) |
 Hochu OtsukaFred (voice) | Fred (voice) |
 ChafurinBach (voice) | Bach (voice) |
 Ikuko TaniDunkelheit / Lumiere (voice) | Dunkelheit / Lumiere (voice) |