Draft:ADELTA

  • Comment: Pretty much all primary sources with no WP:SIGCOV about the circle itself. Tenshi! (Talk page) 13:09, 2 November 2025 (UTC)
ADELTA
IndustryVisual novels
Drama CDs
Founded2014; 12 years ago (2014)
OwnerRinko Kurosawa
SubsidiariesADELTA:M
Websiteadeltaz1.wixsite.com/adeltaz1/

ADELTA is a Japanese dōjin circle founded in 2014, mainly known in creating Boys' love visual novels. The circle is led by Rinko Kurosawa, who handles scenario writing, illustration, background art, and movie sequences.[1] They are primarily known for works such as Hashihime of the Old Book Town and Ooe.[2][3]

History

ADELTA began as writer-artist Rinko Kurosawa, who handled scenario, illustration and many production duties fro the circle's releases, released Cocoon, in 2014, followed up with a direct sequel released the same year, Cocoon BN -Black Noise-; the circle sold packaged copies at shops and later made digital versions available.[4][5]

In 2016, ADELTA achieved broader recognition with the release of their second game, Hashihime of the Old Book Town,[2] the title gained strong attention for its surreal writing and distinctive artstyle. A 17+ PlayStation Vita port of the game called Hashihime of the Old Book Town append was released exclusively to Japan, later followed by a Nintendo Switch release in 2021, localised in English and Chinese, published by Dramatic Create.[6][7] It features additional content that were originally available on the official website now fully voiced.[8][9]

Following Hashihime, ADELTA would later release UuultraC, in 2020.[10][11] Around the same period, ADELTA established another dōjin circle mainly focused on producing audio works for all ages called ADELTA:M.[12] In 2021, ADELTA announced its next major title, Ooe, via its official blog.[13] In 2024, ADELTA released a trial version of the game, which then later followed up with the complete edition of the game, in 2025.[3]

English localisation

On 2017, MangaGamer announced they had acquired the rights to localise Hashihime of the Old Book Town in English and Chinese, it was later published in 2019, on Steam and their official website.[14][15] They would later be responsible for localising and selling ADELTA's further titles in overseas such as UuultraC and Ooe.[16][17]

Members

ADELTA

  • Rinko Kurosawa: Founder. She is credited with scenario writing, character design, illustration, background art, and movie sequence production.[1]

ADELTA:M

  • Aoni Tsuki: Scenario writer[18]
  • Rinko Kurosawa: Provides illustration for ADELTA:M projects[18]

Video games

Game Details
Cocoon

Original release date(s):
  • JP: 1 April, 2014
 Release years by system:
2014 - Microsoft Windows
Notes:
  • The game became available as a digital download in 24 May, 2014
  • A fan disc called Cocoon BN -Cocoon Black Noise- was released for Windows the same year featuring a new route and new scenes.


Hashihime of the Old Book Town

Original release date(s):
  • JP: 13 August, 2016

  • WW: 26 September, 2019
 Release years by system:
2016 - Microsoft Windows
2018 - PlayStation Vita
2021 - Nintendo Switch
Notes:
  • The PlayStation Vita port, called Koshotengai No Hashihime NOMA, was rated CERO D (17+); the sex scenes were removed. Added additional after-story scenes for every route.


UuultraC

Original release date(s):
  • JP: 18 September, 2020

  • WW: 24 March, 2022
 Release years by system:
2020 - Microsoft Windows


Ooe

Original release date(s):
  • JP: 19 April, 2025

  • WW: TBA
 Release years by system:
2025 - Microsoft Windows
TBA - iOS
TBA - Android

References

  1. ^ a b "INFO". adeltaz1 (in Japanese). Retrieved 2025-11-02.
  2. ^ a b "古書店街の橋姫". hashihime (in Japanese). Retrieved 2025-11-02.
  3. ^ a b "最新". Owen (in Japanese). Retrieved 2025-11-02.
  4. ^ "cocoon". cocoon1.x.fc2.com. Archived from the original on 2014-07-07. Retrieved 2025-11-02.
  5. ^ "Cocoon". adeltaz1 (in Japanese). Retrieved 2025-11-02.
  6. ^ "Nintendo Switch版 古書店街の橋姫 々（のま）". dramaticcreate.com (in Japanese). Retrieved 2025-11-02.
  7. ^ Romano, Sal (2021-06-04). "'Mysterious and psychedelic boys love' visual novel Hashihime of the Old Book Town Append announced for Switch". Gematsu. Retrieved 2025-11-06.
  8. ^ "後日談短編". hashihime (Hashihime of the Old Book Town after-stories) (in Japanese). Retrieved 2025-11-02.
  9. ^ "Nintendo Switch版 古書店街の橋姫 々（のま）". dramaticcreate.com. Retrieved 2025-11-02.
  10. ^ "ウウウルトラC". adeltaz1 (in Japanese). Retrieved 2025-11-02.
  11. ^ "年齢確認". Uuultrac (in Japanese). Retrieved 2025-11-02.
  12. ^ "TOP". ADELTA : M (in Japanese). Retrieved 2025-11-02.
  13. ^ adeltaz1 (2021-04-11). "次回作情報". adeltaz1 (in Japanese). Retrieved 2025-11-02.{{cite web}}: CS1 maint: numeric names: authors list (link)
  14. ^ "Hashihime of the Old Book Town". mangagamer.org. Retrieved 2025-11-02.
  15. ^ MangaGamer (April 1, 2017). "MangaGamer on Twitter: And Announcement #3: Our next BL title, #Hashihime of the Old Book Town from @adelta_z1!". Twitter. Retrieved 2025-11-02.
  16. ^ "MangaGamer Licenses The Pillagers of Raillore, UUULTRA C Visual Novels". Anime News Network. 2025-11-06. Retrieved 2025-11-06.
  17. ^ "Showa-Era BL Thriller 'Ooe' Brings ADELTA's Mystery To PC In The West". Noisy Pixel. 2025-07-07. Retrieved 2025-11-06.
  18. ^ a b "INFO". ADELTA : M (in Japanese). Retrieved 2025-11-02.
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