OVA
Finished airing
1 episode
Toaru Kagaku no Railgun S: Daiji na Koto wa Zenbu Sentou ni Osowatta
A Certain Scientific Railgun S: All the Important Things I Learned in a Bathhouse · とある科学の超電磁砲S 大事なことはぜんぶ銭湯に教わった
Characters and voice actors
Staff and studios
Kamachi, Kazuma
Original creator
J.C.Staff
Animation production