A Certain Scientific Railgun is itself a spinoff of Kazuma Kamachi and illustrator Kiyotaka Haimura’s A Certain Magical Index novel series.
Nogi launched the manga spinoff of Motoi Fuyukawa’s A Certain Scientific Railgun manga series in Monthly Comic Dengeki Daioh in April 2017.
The August issue of Kadokawa’s Monthly Comic Dengeki Daioh magazine announced on Saturday that Yasuhito Nogi’s A Certain Scientific Railgun: Astral Buddy manga will reach its climax in its September issue on July 27.
Seven Seas Entertainment will ship the third English volume of the manga on July 14.