Mondaiji-tachi ga Isekai kara Kuru Sou Desu yo?: Onsen Manyuuki (OVAs)
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.
FantasyLight NovelSupernatural