The Dark May Project (暗闇の五月計画 Kurayami no Gogatsu Keikaku?, Yen Press: Project Dark May) was an experiment carried out in Academy City, aimed at replicating Accelerator's powers by implementing similar patterns of ability operation.[1]


Dark May Project

The Dark May Project

The Dark May Project was an experiment that used subjects who were most likely Child Errors, in an effort to replicate Accelerator's powers by using a similar pattern of ability operation. This was done by referencing the cognitive patterns of Accelerator himself in order to optimize the personal realities of certain espers taking part in the experiment. Kinuhata Saiai was once a part of this experiment which taught her to use her ability as an automatic self-defense capability that activates if she is attacked, similar to Accelerator's vector shield.[1] Kuroyoru Umidori was also a subject in the project, and apparently killed all the researchers at one point, bankrupting the project.[2]

Saiai stated that it wasn't usual for children of the experiment to end up well, as many of them ended up in dissection tables while scientists tried to figure out in which part of the brain the personal reality was located.[1]

One of the after effects of the project is that Accelerator's personality may be ingrained into the subject. Kuroyoru Umidori, Tsurigane Saryou, and Yuzuriha Ringo seem to be the ones to have such side effects.[3][4][5]


At some point of the past, Kuroyoru apparently killed all the researchers, bankrupting the project.[2]


Toaru Majutsu no IndexEdit

Battle Royale ArcEdit

Main article: Battle Royale Arc

When Kakine Teitoku brought up Kinuhata Saiai being a former test subject of the Dark May Project, she mentioned that she was super happy compared to the test subjects of Produce who had their brains chopped up like a Christmas cake.[1]

World War III ArcEdit

Main article: World War III Arc

The Dark May Project was mentioned during Accelerator]]'s discussion with Misaka Worst after their arrival in the Elizalina Alliance of Independent Nations. Although Worst hadn't warmed up to him for sparing her, the Level 5 urged her to cooperate in looking for better leads related to the parchment pieces. Worst refused, but Accelerator reminded her that her fate as a clone would be the same because they would remain disposable unless something was done. The Third Season clone stubbornly remained uncooperative until Accelerator opened a possibility for her to be useful through the Dark May Project. Misaka Worst saw it a worthy opportunity and decided to agree.[6]

Shinyaku Toaru Majutsu no IndexEdit

Freshmen ArcEdit

Main article: Freshmen Arc

When they met, Accelerator told Kuroyoru Umidori that he had once eliminated Academy City's dark side and wanted to know why her dark organization was still active. Kuroyoru replied with anger that not everyone in the world would just get along with one another. Accelerator realized that she was a subject of the Dark May Project after observing her pattern of calculation and manner of speaking.[3]

Toaru Kagaku no RailgunEdit

Jailbreaker ArcEdit

Main article: Jailbreaker Arc

Following Tsurigane Saryou's betrayal, Oumi Shuri learned that her involvement in the Dark May Project transformed her personality.[4] It is unknown as to what extent the Dark May Project changed her as Oumi Shuri could not tell Tsurigane would betray her until the moment she attacked.[7]

Toaru Kagaku no Dark MatterEdit

DarkMayProject survivors

Yobou Banka standing next to a board with the pinned photos of the project's survivors.

Kakine saved Yuzuriha Ringo from a bunch of thugs because she was one of the survivors of the Dark May Project. Yobou found out about more survivors to contact, but Kakine refused the offer so as not to be detected. His goal was not to fight with Accelerator, but he wanted to know Accelerator's calculation pattern for an unknown reason.[5]

Known ParticipantsEdit


Dark Side of Academy City

Factions and Organizations

Board of Directors (Board Chairman)
Experiments and Projects

Aleister's Plan

Key Events (Timeline)

See also: Academy City

Community content is available under CC-BY-SA unless otherwise noted.