Kujibiki Unbalance (Japanese: くじびきアンバランス,Hepburn: Kujibiki Anbaransu), as it exists in the real world, is a three-episode OVA from the highly popular 2004 anime Genshiken, as well as a series of three light novels by Genshiken anime collaborator Michiko Yokote. Within the world of Genshiken, however, Kujibiki Unbalance is a popular ongoing manga and 26-episode anime adaptation, which is eagerly watched and discussed by the main characters. These same characters also purchase associated products and adult-oriented dojinshi based on the series, which constitute the motivation for some of the "club activities" held by the Genshiken. Genshiken characters who are fans of Kujibiki Unbalance tend to refer to it by the shorthand name of Kuji-Un (くじアン,Kujian).
The series is, in essence, a compilation of many of the standard themes found in certain kinds of anime and manga series: childhood promises as the source of relationship drama, the influential yet shadowy Student Council, somewhat contrived scenarios designed to push the plot forward, mid-series "recaps" to remind viewers of previous events, and a sudden crisis that threatens to alienate the main characters and jeopardizes the outcome of the series. Kujibiki Unbalance is meant to be a very stereotypical anime series, serving as both an homage to and a parody of the kinds of series that the otaku of Genshiken would enjoy.
The series was originally shown both as short "excerpts" within the Genshiken manga, as well as three full OVA episodes (labeled as episodes 1, 21, and 25 of an assumed 26-episode TV series) released to DVD with Genshiken in Japan. At Comiket 69, Media Factory announced the release of the second season of Genshiken, which was later clarified as being a 12-episode season of Kujibiki♥Unbalance. In a reversal of its OVA release alongside Genshiken, the DVD release of Kujibiki Unbalance included a total of three Genshiken OVA episodes, introducing the character Ogiue and continuing the plot of the manga from where the TV series left off.
Kujibiki Unbalance was originally a comic within a comic in the Genshiken manga, which also had an anime adaptation (which was sometimes discussed). When part of the manga of Genshiken was adapted to anime, the anime version of Kujibiki Unbalance was given greater emphasis though the manga is still the original work (the Genshiken members sometimes argue over the Kuji-Un anime's faithfulness to the manga). The version of Kujibiki Unbalance as it appeared in the Genshiken anime was made into a three episode OVA released to DVD along with Genshiken, allowing for a small glimpse of what those within Genshiken are almost always watching on television.
In May 2006, Anime News Network reported that the second series of Genshiken, to be released this fall in Japan, was in fact the "first season" of Kujibiki Unbalance, though with major character redesigns.