とある科学の超電磁砲外伝 アストラル・バディ (Toaru Kagaku no Railgun Gaiden: Astral Buddy) A spin-off manga ofToaru Kagaku no Railgunwritten by Kamachi Kazuma and drawn byNogi Yasuhito, starringHokaze Junkoand other Tokiwadai students and taking place in Tokiwadai Middle School.