Is Toaru Kagaku no Railgun S: Daiji na Koto wa Zenbu Sentou ni Osowatta hentai?
English title: A Certain Scientific Railgun S: All the Important Things I Learned in a Bathhouse
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

OVA · 2014 · 1 episodes · PG-13 - Teens 13 or older
Comedy
Bundled with the official visual book.
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