Problem children are coming from another world, aren't they? OVA

問題児もんだいじたちが異い世界せかいから来るくるそうですよ? 〜温泉おんせん漫遊まにゅー記き〜

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.