Is Toaru Kagaku no Railgun S: Motto Marutto Railgun hentai?
English title: A Certain Scientific Railgun S Specials
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

Special · 2013 · 2 episodes · PG-13 - Teens 13 or older
Comedy
Toaru Kagaku no Railgun S specials that were released on Blu-ray and DVD volumes.
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