Mondaiji-tachi ga Isekai kara Kurusou Desu yo?: Onsen Man`yuuki
Mondaiji-tachi ga Isekai kara Kuru Sou Desu yo? (2013), Mondaiji-tachi ga Isekai kara Kuru Sou Desu yo? OAD, Mondaiji-tachi ga Isekai kara Kuru Sou Desu yo? OVA, Problem Children Are Coming from Another World, Aren`t They?: The Hot Spring Fun Trip, 문제아들이 이세계에 온다는 모양인데요?, 問題児たちが異世界から来るそうですよ? ~温泉漫遊記~, 问题儿童都来自异世界? (2013)
The three of you are participating in a gift game at a hot spring village, which aims to help the community discover a new water source. This is included as an OVA bundle along with the eighth volume of the light novel.