Is Mondaiji-tachi ga Isekai kara Kuru Sou desu yo?: Onsen Manyuuki hentai?
English title: Problem Children Are Coming from Another World, Aren't They? OVA
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

OVA · 2013 · 1 episodes · PG-13 - Teens 13 or older
Comedy, Ecchi, Fantasy, Isekai
Izayoi, Asuka, and You have been invited to participate in a Gift-Game at a hot spring village to help the small community there find a new water source. OVA bundled with the eighth volume of the light novel.
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