The official website of the Toaru Kagaku no Railgun television anime series has announced on Wednesday that early pre-ordered copies of the anime's fifth Blu-ray/DVD volume will bundle a bonus DVD. Similar to the bonus DVD that came with the anime's first Blu-ray/DVD volume, Dengeki Chokugeki!! Toaru Kagaku no Railgun Special Disc 2 will contain new bonus anime, an unspecified special project, and the promotional video that was screened at Comic Market 77 last December. The fifth Toaru Kagaku no Railgun volume will ship in Japan on May 28.

The anime aired from October of 2009 to March of 2010.

The online retailer Amazon lists the July 24 release of the Toaru Kagaku no Railgun Official Visual Book with a bundled DVD. According to the listing, the DVD will include a "13'th episode" (note the extra apostrophe) titled "Entenka no Satsuei Model mo Raku Ja Arimasen wa ne." ("Being a Photo Shoot Model Under the Hot Sun Isn't Easy, Is It?") Other retailers such as Neowing had listed the bundled DVD with a tentatively titled "Toaru Beach no Tokuten Eizō" (A Certain Beach Video Extra), but had not specified whether that extra was animated or not.

The television anime adaptation of Toaru Kagaku no Railgun (A Certain Scientific Railgun), Motoi Fuyukawa's manga spinoff of Kazuma Kamachi's Toaru Majutsu no Index (A Certain Magical Index) light novels, ran for 24 episodes from October of 2009 to March of 2010. Episode 13 (without the apostrophe) was titled "Bikini wa Mesen ga Jōge ni Wakaremasu kedo Wanpīsu wa Karada no Rain ga Demasu kara Hosoi Kata shika Niawanai desu yo" ("A bikini divides one's attention between your upper and lower body, but a one-piece outfit accentuate the body's curves so it is only suitable for slim people, you know"). This episode was included in the fifth DVD/Blu-ray Disc volume (pictured at right).