Toaru Majutsu no Index Wiki
Pentagram-GreatGold.png Series Three Overhaul Project
This article will be undergoing extensive revision as part of a wiki-wide overhaul

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]


CleanerBot small.png Index: "What is this? Agathions?"

This section may require cleanup to meet Toaru Majutsu no Index Wiki's quality standards.
Please help improve this article if you can. The talk page or comments section may contain suggestions, or talk to an administrator.

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]

Later during the events of Toaru Kagaku no Dark Matter, it was revealed that the Dark May Project in truth implanted specific portions of Accelerators thoughts, feelings and beliefs into their test subjects in the hopes of improving the ability development of its Espers. The thoughts and feelings being the first ranked's sense of Pride, Suspicion and Attachment.[6]

After successfully implanting the Accelerator's thought patterns, the researchers would then begin brutally testing their test subjects to see if their Esper powers have gone through any changes/improvements using highly painful & brutal methods. As seen during their tests and experimentation on Yuzuriha Ringo where by using various painful stress inducing tests & drugs in order to stimulate her brain and force her esper powers to improve its "values". These painful and extremely traumatic tests in turn would then leave her being severely injured on a daily basis and her developing several gaps in her memory due to the trauma and stress. Later the researcher's were even willing to go as far as to using severe psychologically torture on Ringo in order to stimulate her implanted sense of "attachment" from Accelerator by physically abusing her friend, Ryuugou Tomoka right in front of her and chaining her to the wall to stop her from helping her in order to gather more data on her power's ability to improve when she was put under immense stress and psychological pain.[6]


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


Toaru Majutsu no Index

Battle Royale Arc

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 Arc

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.[7]

Shinyaku Toaru Majutsu no Index

Freshmen Arc

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 Railgun

Jailbreaker Arc

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.[8]

Toaru Kagaku no Dark Matter

Yuzuriha Ringo Arc

Main article: Yuzuriha Ringo Arc

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 Participants



v  e
Dark May Project
Kinuhata-Saiai.jpg Kuroyoru Umidori.jpg Yuzuriha Ringo DM profile.png
Kinuhata Saiai Kuroyoru Umidori Yuzuriha Ringo
Tsurigane.jpg Tomoka.jpg Kimi (color).jpg
Tsurigane Saryou Ryuugou Tomoka Shundan Kimi
v  e
Dark Side of Academy City
Factions and Organizations Board of Directors (Board Chairman: FormerCurrent)
Kihara FamilyHound DogGROUPSCHOOLITEMMEMBERBLOCKFreshmenScavengerFull CourseSpark SignalDisciplinary ActionL.S.S.STUDY
Experiments and Projects Level 6 Experiments (Level 6 Shift Project) • Radio Noise Project (Third Season) • Agitate Halation ProjectClone DollyExterior ProjectDark May ProjectProduceFive OverRensaAnatomy Mechatronics
Total Human Cyborg Replacement ProjectWhite AlligatorChemicaloid Project
Aleister's Plan Windowless BuildingImaginary Number DistrictMisaka NetworkUnderlineDRAGON
Key Events (Timeline) Sisters Arc0930 IncidentSkill-Out UprisingBattle Royale ArcGemstone MiningDRAGON ArcWorld War IIIFreshmen ArcBaggage City ArcAgitate Halation ArcMental Out ArcChristmas Eve ArcOperation Handcuffs Arc
Other Magic-Science TreatyMilitaryDestroyerVoice on the Phone
See also: Academy City