Kamijou Touma/Chronology (Toaru Kagaku no Railgun)

Toaru Kagaku no Railgun OVA
Touma appears briefly before Mikoto near a certain vending machine, here he greets Mikoto as Biribiri and gets attacked for it, and later gets blamed by Mikoto for being the one who is constantly watching her, however, he denies this. He is later demanded by Mikoto to fight her again, however, she is stopped by the arrival of Anti-Skill who also mistakes them for having a lover's quarrel.

Toaru Majutsu no Index-tan
Touma appears in Toaru Majutsu no Index-tan where he re-enacts his role in the series, albeit in a more skewered manner. Here he meets Index-tan a smaller version of Index on his balcony like the in the original series although she is quickly picked up by bird. Touma and Index-tan are later seen where Index-tan on top of his head while he is walking while parodying the antics of Shana-tan (another of J.C. Staff's parody of a series, specifically Shakugan no Shana) while asking the viewer to purchase the Shakugan no Shana DVD. Touma is later seen being beaten-up by Kaori while she rambles on about what happened with her voice actress being drunk. During the part where Touma insert his right hand inside Index-tan's mouth to disable the magic within her, Touma says "such misfortune" after being vomited upon by Index-tan. Later he is apparently killed by Stiyl and Kaori after convincing them to stop being side characters. Finally Touma and Index-tan watch a commercial featured by Motoharu and Aogami Pierce, asking Index-tan to be quiet after her amazement.

In the second episode, Touma meets Index-tan again and instead of being taken by a bird she is taken by a cat. During the fight between Touma and Accelerator, when Touma slaps Accelerator hand away Accelerator somehow blushed because of this. Later Touma gets scared and wets his pants after seeing Komoe's car being driven by Komoe (although she cannot be seen). When Touma is waiting for Hyouka and Index-tan in a changing booth, he comments on how they are mumbling the song they are singing as to go around copyright laws. When Touma is the hospital he is visited by Index-tan and a disguised Kuroko, who mistakes the antics of Touma's voice actor for his. Lastly Touma is apparently caught-up in the blast caused by Accelerator using his plasma storm, after Mikoto clones backfire in their plan in manipulating the windmills, which they blew up.

In the third episode, the meeting with Index is reenacted again, however, this time Index-tan now has the form of and references the show and the similarity between them before she is later taken away by Sphynx. The first episode of the 2nd season is later used in the second sketch; during the scene where Touma is searching for Index-tan, Sphynx runs away which forces Touma to follow, however, when he arrives where Sphynx stopped, it had been replaced by another cat. Another sketch features Touma walking with Index-tan on his head, while Angelene has Agnese-tan on the top of her head, here, Touma is later abused by both Index-tan and Agnese-tan, though is unfazed by it. The last notable sketch Touma is in is where he is attacked by Kaori during the English Knight's arrival at Japanese soil, here, after being taken to a hospital Kaori leaves after leaving a present and a letter, apologizing for her behavior (and once again referencing Kaori's seiyu's drunken antics) as well promising to for it with her body.

The fourth episode, the meeting with Index is once again reenacted, however, instead Touma punches Index-tan in a reference of Saint Seiya far away after asking for food. In another sketch, Touma seemingly makes fun of a choking Aisa while rubbing her back, by continually asking her if she is okay even though she tells him that it's nothing. At this point, Seiri appears for no apparent reason to tell Touma that she has a front hook bra, which immediately engrosses Touma, as he likes front hook bras since they are "action-ready" and "easily-accessible". In the final scene, Touma and Index-tan are seen walking together again, whither Touma begins to doubt the comedy shorts continued existence since they are running out of things to do, they are start arguing with Index-tan inevitably pulling his hair until she tires out. In the end Touma suggests of talking Orsola Aquinas instead, which angers Index-tan.