Mondaijitachi ga Isekai kara Kuru Sōdesuyo Zetto, Vol. 2 - Anri Sakano; Tatsunoko Tarō; Yū Amano: 9784047128712 - AbeBooks

Mondaijitachi ga Isekai kara Kuru Sōdesuyo Zetto, Vol. 2 by Anri Sakano; Tatsunoko Tarō; Yū Amano - ISBN 10: 4047128716 - ISBN 13: 9784047128712 - Fujimishobo : Kadokawagurupuhorudingusu. - 2013

Mondaiji-tachi ga isekai kara kuru soudesu yo - Baka-Tsuki

Mondaiji-Tachi Ga Isekai Kara Kuru Sou Desu Yo Volume 2 - Arrival of A Devil King, PDF, Currency

Mondaiji-tachi ga Isekai kara Kuru Sou Desu yo (Don't Problem Children Come From An Alternate World?) Image by Amano Yuu #1203191 - Zerochan Anime Image Board

Mondaiji-tachi ga Isekai Kara Kuru Sou Desuyo? 12

Mondaiji-tachi ga Isekai Kara Kuru Sou Desuyo? 12

Mondaiji-Tachi Ga Isekai Kara Kuru Sou Desu Yo Volume 2 - Arrival of A Devil King, PDF, Currency

Mondaiji-Tachi Ga Isekai Kara Kuru Sou Desu Yo Volume 2 - Arrival of A Devil King, PDF, Currency

Mondaiji-Tachi Ga Isekai Kara Kuru Sou Desu Yo Volume 2 - Arrival of A Devil King, PDF, Currency

Some of Tarou Tatsunoko-Sensei's Light Novel Works, all of them are interconnected. I want to tell something in the comments, please read if you want, Of course it's related to Mondaiji Series.