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? – Light Novel Reborn

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

tatsunoko - Used - AbeBooks

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 Desuyo? 12

Takarakuji de 40-oku Atattandakedo Isekai ni Ijuu Suru (Light Novel) Manga

Mondaiji-tachi ga Isekai kara Kuru Sou Desu yo?

Mondaiji-tachi ga Isekai kara Kuru Sou Desu yo (Don't Problem Children Come From An Alternate World?) Image by Amano Yuu #1418165 - Zerochan Anime Image Board

Đọc Mondaiji-tachi ga Isekai Kara Kuru Sou Desu yo? - Minh họa - Cổng Light Novel - Đọc Light Novel

Mondaiji tachi ga isekai kara kuru sou desu yo ? - Novel de Glace

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.