Problem Children Are Coming from Another World, Aren't They? OVA

Mondaiji-tachi ga Isekai kara Kuru Sou Desu yo?: Onsen Manyuuki

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.