A stage presentation at the "Dengeki Bunko 25th Anniversary Fall Dengeki Festival" event on Sunday revealed that the A Certain Scientific Accelerator (Toaru Majutsu no Index Gaiden: Toaru Kagaku no Accelerator) manga is getting a television anime adaptation in 2019. The event also revealed a key visual.

The anime will star Nobuhiko Okamoto as Accelerator and Rina Hidaka as Last Order. Nobuharu Kamanaka (Big Order) is directing the anime.

Arata Yamaji began the spinoff series about the A Certain Magical Index character Accelerator in Kadokawa's Monthly Comic Dengeki Daioh magazine in 2013. Kadokawa will ship the ninth compiled volume on October 11. Seven Seas Entertainment is releasing the manga in English.

Dengeki Bunko editor Kazuma Miki announced the A Certain Magical Index III anime season as part of the "A Certain Project 2018" (2018-Nen To Aru Project) at the "Dengeki Bunko Aki no Saiten 2017" (Dengeki Bunko Autumn Festival 2017) event in October 2017. He also said at the time that the project is "not just Index ." A Certain Magical Index III premiered on October 5.

Kazuma Kamachi's A Certain Magical Index light novel series has inspired two television anime series, a 2013 anime film, and multiple manga adaptations. A Certain Scientific Railgun spinoff manga has also inspired two television anime adaptations and an original video anime (OVA).

Yen Press is releasing the original light novel series in English, and Funimation has released all of the anime adaptations in North America outside of the A Certain Scientific Railgun OVA. Seven Seas Entertainment is releasing the A Certain Scientific Accelerator manga in English, and Yen Press is releasing the A Certain Magical Index manga in English.

Update: Added key visual and teaser video from anime's official website.

Source: Dengeki Bunko 25th Anniversary Fall Dengeki Festival livestream