# Cool Devices
**Cool Devices** (クールディバイシス) is a Japanese adult (hentai) original video animation (OVA) anthology consisting of 11 self-contained episodes released direct to home video in Japan between April 25, 1995 and November 28, 1997.[1](https://anime.jhiday.net/hof/anime/1339) • [2](https://en.namikoi.com/anime/3006) The episodes share no continuing plot or recurring characters; each is a standalone story with its own characters, setting, and art style, tied together by explicitly erotic and frequently non-consensual subject matter involving bondage and other extreme fetish themes.[3](https://www.animemanga.com/anime/10067%2CCool%20Devices) • [4](https://anime.mikomi.org/series/394.html) Fan databases describe it as one of the most notorious hentai titles of the 1990s.[4](https://anime.mikomi.org/series/394.html) • [5](https://www.animeclick.it/anime/1003/cool-devices)
| Key fact | Detail |
|---|---|
| Format | 11-episode hentai OVA anthology, each episode a standalone story[1](https://anime.jhiday.net/hof/anime/1339) • [3](https://www.animemanga.com/anime/10067%2CCool%20Devices) |
| Japanese release | April 25, 1995 to November 28, 1997[1](https://anime.jhiday.net/hof/anime/1339) |
| Episode length | About 23 to 30 minutes each, roughly 24 minutes 45 seconds per episode by one database count[4](https://anime.mikomi.org/series/394.html) • [1](https://anime.jhiday.net/hof/anime/1339) |
| Source and staff | Original manga credited to Protonsaurus, Konodonto, and Mon-Mon; directors include Hiroyuki Utatane, Yumisuke Kotoyoshi, and Osamu Shimokawa[3](https://www.animemanga.com/anime/10067%2CCool%20Devices) |
| Character design | Different design teams per episode, including Yasuomi Umetsu for "Yellow Star"[3](https://www.animemanga.com/anime/10067%2CCool%20Devices) • [4](https://anime.mikomi.org/series/394.html) |
| North American release | English dub by Critical Mass Video (Right Stuf's adult label), February 1 to May 31, 2005[6](https://dubbing.fandom.com/wiki/Cool_Devices) |
| Censorship | Reported banned in Canada; the second DVD volume was classified R 18+ in Australia; the German-language video compilation was indexed by Germany's Federal Review Board (BPJM)[4](https://anime.mikomi.org/series/394.html) • [7](https://www.classification.gov.au/titles/cool-devices-part-2-episodes-3-6) • [8](https://media.frag-den-staat.de/files/foi/951344/hentai-teil-1-e-6990-v.pdf) |
## Format and content
Cool Devices was produced during the peak years of the OVA market, when direct-to-video distribution allowed adult animation to bypass television restrictions. Each episode, labeled an "Operation," presents its own narrative without continuing characters.[9](https://www.imdb.com/title/tt0309467/episodes/) • [3](https://www.animemanga.com/anime/10067%2CCool%20Devices) The official synopsis described the tapes as strong stories charged with erotic content, presented without Japan's export censorship.[2](https://en.namikoi.com/anime/3006)
The content is consistently extreme by the standards of mainstream animation. Reviews and database tags identify bondage, rape, sexual violence, exhibitionism, and sex parties as recurring material.[4](https://anime.mikomi.org/series/394.html) • [5](https://www.animeclick.it/anime/1003/cool-devices) A contemporary review on the mikomi database criticized the series for what it described as misogyny, rape, torture, and degradation in every episode, with the graphic rape reaching a peak in "Yellow Star."[4](https://anime.mikomi.org/series/394.html) Modern database guidance follows the same line, telling viewers to skip the series if non-consensual scenarios are a hard limit, since multiple episodes feature brutal depictions of rape.[10](https://www.animeoshi.com/anime/cool-devices)
## Episodes
The eleven episodes, with their Japanese broadcast dates where recorded, are:[9](https://www.imdb.com/title/tt0309467/episodes/) • [3](https://www.animemanga.com/anime/10067%2CCool%20Devices)
1. Operation 01: Curious Fruit (1995)
2. Operation 02: Sacred Girl (1995)
3. Operation 03: Lover Doll / Winter Swimsuit / Enema (1996)
4. Operation 04: Kirei (1996)
5. Operation 05: Seek I: Slave Girl Marino (1996)
6. Operation 06: Seek II: S&M Queen Saki (1996)
7. Operation 07: Yellow Star (1996)
8. Operation 08: Slave Warrior Maya I (1996)
9. Operation 09: Slave Warrior Maya II (1997)
10. Operation 10: Binding (1997)
11. Operation 11: Fallen Angel Rina (1997)
Two episodes form linked pairs: the Seek pair follows Marino, a captured virgin trained as a slave by a dominatrix and her master, and then Saki after her master's death; the Slave Warrior Maya pair follows an ordinary Japanese woman tricked on another world into sex slavery.[9](https://www.imdb.com/title/tt0309467/episodes/) The first episode, Curious Fruit, follows Ai, a schoolgirl drawn into an underground S&M world by a couple who live that lifestyle, and it remains the series' best-known entry with a 7.4/10 user score on IMDb.[9](https://www.imdb.com/title/tt0309467/episodes/) • [10](https://www.animeoshi.com/anime/cool-devices)
## Production
Because each episode was handled by a different creative team, animation quality and character design vary from episode to episode, a variation reviewers single out as the series' defining production trait.[4](https://anime.mikomi.org/series/394.html) • [3](https://www.animemanga.com/anime/10067%2CCool%20Devices) Credited directors include Hiroyuki Utatane, Yumisuke Kotoyoshi, Osamu Shimokawa, Hiroshi Matsuda, Hiro Asano, Akira Nishimori, and Junichi Tanabe (opening sequence); Masamichi Kaneko is credited with screenplay work across four episodes, and Mon-Mon with script, original story, and original character design.[11](https://www.imdb.com/title/tt0309467/fullcredits/) • [3](https://www.animemanga.com/anime/10067%2CCool%20Devices) The animeMANGA database lists LEED Publishing as the production company.[3](https://www.animemanga.com/anime/10067%2CCool%20Devices) The MyAnimeList-linked database credits the producer as Green Bunny and lists NuTech Digital and Critical Mass Video as licensors.[1](https://anime.jhiday.net/hof/anime/1339)
Notable staff. Character designer Yasuomi Umetsu, who later created the adult OVA titles [Kite](https://www.edgepedia.org/kite-1998-film) and Mezzo Forte, designed the "Yellow Star" episode, and the mikomi review names his work as the standout design of the series.[4](https://anime.mikomi.org/series/394.html) • [3](https://www.animemanga.com/anime/10067%2CCool%20Devices) One reviewer credits Hiroyuki Utatane with the scenario and designs of episode 2, "Sacred Girl."[4](https://anime.mikomi.org/series/394.html) The Italian database AnimeClick attributes part of the series' reputation to the involvement of such known industry figures.[5](https://www.animeclick.it/anime/1003/cool-devices)
## Reception and censorship
Cool Devices acquired a reputation as one of the most infamous hentai series ever made.[4](https://anime.mikomi.org/series/394.html) The mikomi database reports, citing [Anime News Network](https://www.edgepedia.org/anime-news-network), that the title was banned in Canada.[4](https://anime.mikomi.org/series/394.html) In Australia, the second DVD volume (episodes 3 to 6) was classified R 18+ on August 28, 2007 with the consumer advice "High level animated sex scenes, High level themes," with Siren Visual Entertainment as applicant.[7](https://www.classification.gov.au/titles/cool-devices-part-2-episodes-3-6) In Germany, the videos were placed on the indexed list (jugendgefährdende Schriften) of the Bundesprüfstelle für jugendgefährdende Schriften, meaning restricted from general sale, with the index decision publicized in the Bundesanzeiger.[8](https://media.frag-den-staat.de/files/foi/951344/hentai-teil-1-e-6990-v.pdf) • [12](https://erziehungsbuero.de/wp-content/uploads/2023/12/BzKJ_Aktuell_Ausgabe-11.2023.pdf)
English release. The series was released in North America on DVD by Critical Mass Video, the adult label of Right Stuf, from February 1 to May 31, 2005; the English dub was recorded in 2004 and 2005 at Rubba-Dub-Dub Studios, with actors credited under pseudonyms including Tara Sands as Maya Mizutani.[6](https://dubbing.fandom.com/wiki/Cool_Devices) • [11](https://www.imdb.com/title/tt0309467/fullcredits/) A four-volume North American DVD set was completed with volume 4 shipping May 31, 2005 at a list price of $29.95.[13](https://d1vzi28wh99zvq.cloudfront.net/pdf_previews/12541-sample.pdf)
## Ratings and legacy
Community ratings place the series in the middle ranges for its category: 7.7/10 on the AnimeOshi Oshimeter from 487 ratings, 6.3/10 on AnimeLoud from 2,971 votes, and 6.22/10 on namikoi.[10](https://www.animeoshi.com/anime/cool-devices) • [14](https://animeloud.com.br/anime/cool-devices-1339) • [2](https://en.namikoi.com/anime/3006) Per-episode community scores on AnimeOshi range from 5.2 (Slave Warrior Maya II) to 6.5 (Seek II), with episode 1 at 6.1.[10](https://www.animeoshi.com/anime/cool-devices)
[The Italian](https://www.edgepedia.org/the-italian) database AnimeClick describes Cool Devices as a cult hentai series of 1995/96 renowned for the technical quality of its episodes and a marker of the 1990s alongside [La Blue Girl](https://www.edgepedia.org/la-blue-girl).[5](https://www.animeclick.it/anime/1003/cool-devices) A retrospective on the Vintagecoats blog takes a more critical view, judging that earlier anthology work such as the Pop Chaser episode of [Cream Lemon](https://www.edgepedia.org/cream-lemon) surpassed Cool Devices in cel animation quality and timing, and that the series wanted to be Cream Lemon while positioning itself as more hardcore without the execution to match.[15](https://vintagecoats.net/2014/07/05/mothballs-cool-devices-alphonse-francois-de-sade/) A mikomi reviewer similarly notes that some of the episode concepts later grew into better-known works, naming Kite and Mezzo Forte as spinoffs associated with the same creative circle.[4](https://anime.mikomi.org/series/394.html)
## References
1. [Cool Devices, Anime Watching Challenges Club (MAL-linked data: dates, duration, producer, licensors)](https://anime.jhiday.net/hof/anime/1339)
2. [Cool Devices, namikoi.com (alternative title, run dates, official synopsis)](https://en.namikoi.com/anime/3006)
3. [Cool Devices (OVA, 1995) overview, animeMANGA (episode list, staff, production, length)](https://www.animemanga.com/anime/10067%2CCool%20Devices)
4. [Cool Devices, anime.mikomi.org (description, Canada ban report, episode reviews)](https://anime.mikomi.org/series/394.html)
5. [Cool Devices, AnimeClick.it (Italian database entry and plot notes)](https://www.animeclick.it/anime/1003/cool-devices)
6. [Cool Devices, Dubbing Wikia (English dub and North American release details)](https://dubbing.fandom.com/wiki/Cool_Devices)
7. [Cool Devices Part 2, Australian Classification (R 18+ decision, 28 August 2007)](https://www.classification.gov.au/titles/cool-devices-part-2-episodes-3-6)
8. [Bundesprüfstelle index decision document for the Hentai Teil 1 compilation containing Cool Devices](https://media.frag-den-staat.de/files/foi/951344/hentai-teil-1-e-6990-v.pdf)
9. [Cool Devices episode list, IMDb](https://www.imdb.com/title/tt0309467/episodes/)
10. [Cool Devices: Episode Guide & Ratings, AnimeOshi (Oshimeter score, per-episode scores, viewing guidance)](https://www.animeoshi.com/anime/cool-devices)
11. [Cool Devices full cast & crew, IMDb](https://www.imdb.com/title/tt0309467/fullcredits/)
12. [BPJM Aktuell, Ausgabe 11.2023 (current index listing of Cool Devices)](https://erziehungsbuero.de/wp-content/uploads/2023/12/BzKJ_Aktuell_Ausgabe-11.2023.pdf)
13. [Protoculture Addicts #84, anime release listings (Cool Devices Vol 4 of 4, TRSI, $29.95, 5/31/05)](https://d1vzi28wh99zvq.cloudfront.net/pdf_previews/12541-sample.pdf)
14. [Cool Devices guide, AnimeLoud (6.3/10 from 2,971 votes)](https://animeloud.com.br/anime/cool-devices-1339)
15. [Mothballs: Cool Devices, Vintagecoats (retrospective critique)](https://vintagecoats.net/2014/07/05/mothballs-cool-devices-alphonse-francois-de-sade/)
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*Topic: Encyclopedia › Arts and culture › Screen and stage › Film and television › Series and fictional screen worlds › Anime and manga › Anime series, episodes, and franchises › OVAs, ONAs, and streaming-original anime*
*Initially written Sep 17, 2026 · Reviewed: Sep 30, 2026; Oct 25, 2026 · Edited: Oct 15, 2026; Oct 25, 2026 · Last review: Oct 25, 2026*
*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*
License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license