Ranked #350
Darker than Black: Kuro no Keiyakusha Gaiden

Darker than Black: Kuro no Keiyakusha Gaiden

Alternative Titles

Synonyms: Darker than Black: Ryuusei no Gemini Specials, Darker than BLACK 2 OVA, DTB
Japanese: Darker than BLACK -黒の契約者 外伝


Type: Special
Episodes: 4
Status: Finished Airing
Aired: Jan 27, 2010 to Jul 21, 2010
Duration: 24 min. per episode
Rating: R - 17+ (violence & profanity)
L represents licensing company


Score: 8.161 (scored by 60728 users)
Ranked: #3502
Popularity: #298
Members: 98,596
Favorites: 459
1 indicates a weighted score
2 based on the top anime page.

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Tells the story of what happened to Yin and Hei between the first and second series.

Add episode Episodes

Episodes  0 / 4
Aired  Jan 27, 2010 to Jul 21, 2010
Status  Finished Airing
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Related Anime

Prequel: Darker than Black: Kuro no Keiyakusha
Sequel: Darker than Black: Ryuusei no Gemini

Characters & Voice Actors

Kiuchi, Hidenobu
Kiuchi, Hidenobu
Fukuen, Misato
Fukuen, Misato
Kouda, Kaho
Kouda, Kaho


Wakabayashi, Kazuhiro
Sound Director
Nishimura, Hiroyuki
Yanagisawa, Tetsuya
Ishii, Yasushi
Theme Song Performance, Music

Write a review | More reviewsReviews

Dec 24, 2014
The first season of “Darker Than Black” left the exact fate of two of its central cast in an ambiguous state. This four part OVA continues the story past the first season finale while serving as the transition into the new direction second two would take in Ryuusei no Gemini. This OVA combines the strength of both season into a nice package telling a compelling story, interesting leading characters, and great action scenes.

Good: Fills the gap between seasons 1 & 2

This four part OVA can be summarized as a “couple on the run” sort of story. Hei and Yin are trying to survive daily life read more
I found this review Helpful  Not Helpful
Jun 26, 2010
This is the bridge between Kuro no Keiyakusha (Season 1) and Ryuusei no Gemini (Season 2). For those who watched both seasons THIS IS A MUST! In these 4 episodes they will explain the holes in Ryuusei no Gemini.

(Will update as season ends)

Story: 9/10

These 4 episodes explains about the gap in the 2 years between season 1 and season 2. Like before of DtB, the story is well executed and polished. It is based on the character development between Hei and Yin. Also answers many of the questions that were brought in season 2.

Art: 9/10

Amazing, I would say it is better read more
I found this review Helpful  Not Helpful
Dec 24, 2013

I'll keep this short: Anyone who is a fan of Darker than Black NEEDS to find a way to watch these 4 episodes; they are crucial to understanding so many things about the series, including several things that didn't make sense in season 2, the relationship between Hei and Yin, and Hei's character development.

The OVA bridges the gap between seasons 1 and 2, explaining what happened to Hei and Yin during that time, and not only is this information vital to the plot, it is incredibly entertaining. This OVA is 4 episodes of pure awesome, as we finally read more
I found this review Helpful  Not Helpful
Nov 14, 2011
I really liked Darker Than Black. Not loved, just liked. What made me fall in love with the entire series was Gaiden. An OVA bridging the gap between the first and second seasons, it did not disappoint.

Story - 10:
What Gaiden gives is answers. A better understanding of what went down between Hei and Yin between the two seasons, and a good preventative of confusion before watching Gemini of the Meteor. It has all the amazing qualities of the first season, jam-packed with exciting, intense action and fight scenes, but also smoothly introduces a new chapter in the lives of Hei and Yin. A fantastic mix read more
I found this review Helpful  Not Helpful


Both have very similar storylines .The protagonists are escaping from an establishment .Builds a base for the series to progress .High on action and emotions. 
reportRecommended by kaushik17
At first, both these animes have a similar drama component: in order to do their duty main characters have to kill their loved ones, however in Ga-Rei Zero drama is payed more atention to and is more deep than in DTB. Both these series deal with organisations exterminating threats to the mankind (ghosts in GRZ case and contractors in DTB case). Sure thing there are mystical powers and supernatural abilities included. Also, you will feel painfully sorry for main characters whichever you watch.
In case you watched DTB only because of action and fights, it's unlikely you will like GRZ. There is action  read more 
reportRecommended by lotrus28

Opening Theme

No opening themes found, add themes.

Ending Theme

"Can you fly" by Yasushi Ishii

Recent News

North American Anime & Manga Releases for May
14 replies by JustALEX »»
05-06-15, 1:59 AM
Side Story Episodes of Darker Than Black 2 Are DVD/BD Release Only [Confirmed]
38 replies by Onikukki »»
03-26-10, 10:37 PM

Recent Forum Discussion

Poll: Darker than BLACK - Kuro no Keiyakusha Gaiden Episode 3 Discussion ( 1 2 3 )
134 replies by Akai_Yami »»
05-16-15, 2:30 PM
Which should I watch first? The Gaiden series or Gemini series...
22 replies by DeathlyDiJ »»
04-25-15, 11:54 AM

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