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

Problem Children are Coming from Another World, aren't they? (Japanese: 問題児たちが異世界から来るそうですよ? Romanji: Mondaiji-tachi ga Isekai Kara Kuru Sō Desu yo?), also known as Mondaiji (問題児), is a Japanese light novel series written by Tarō Tatsunoko and illustrated by Yū Amano. An anime adaptation by Diomedéa aired from January 11, 2013 to March 15, 2013.

A sequel to Mondaiji titled Last Embryo began serialization on June 1, 2015 with a new illustrator, Momoko.

A sequel to both Mondaiji and Last Embryo titled Million Crown is planned to begin serialization on October 1st, 2017 with new illustrator, Kougeti.

Plot
Sakamaki Izayoi, Kudou Asuka, and Kasukabe Yō have tremendous powers and are bored with the regular world. An envelope arrives for each person, and when each opens their envelope, they are stunned to see the scenery around them change to a world they had never encountered before. They've been summoned by Kuro Usagi to help the community "No Name" to overthrow the Demon lords.

Main

 * Sakamaki Izayoi
 * Kudou Asuka
 * Kasukabe Yō
 * Black Rabbit

Others

 * Jin Russell
 * Shiroyasha
 * Leticia Draculea
 * Lily
 * Calico Cat

Last Embryo

 * Saigou Homura
 * Kudou Ayato
 * Ayazato Suzuka
 * Tokuteru Mikado
 * Black Rabbit

Million Crown

 * Shinonome Kazuma
 * Natsuki Kayahara
 * Chihiro Amanomiya
 * Hibiki Hitsugaya
 * Fubuki Hitsugaya

Part 1
The series is published by Japanese Publishes Sneaker Bunko. Currently the series is being translated by fan translation group Baka Tsuki. The series can be read here. Give credit to the translators!

Part 2
Last Embryo is the sequel/part 2 of Mondaiji tachi ga isekai kara kuru sou desu yo? The series remains published by Sneaker Bunko with the same author but a new illustrator, Momoko

Anime
A television anime adaptation produced by Diomedéa aired on Tokyo MX from January 11, 2013 to March 15, 2013, and later on other stations. The series was simulcast by Crunchyroll and Anime on Demand. The opening theme is "Black † White" by Iori Nomizu whilst the ending theme is "To Be Continued?" by Kaori Sadohara. The anime adaptation tells the adventures of volumes 1 and 2. The OVA was released as a bundle/special with the release of Volume 8 of the Light Novel series. There were five releases in total with each disc containing two episodes.

Manga
Mondaiji-tachi ga isekai kara kuru sou desu yo? is a Seinen manga series that began serialization in Monthly Comp Ace with Nanamomo Rio as the illustrator. Covering volumes 1 and 2 of the Light Novels and ran alongside the anime, though outlasting it as the eighteen chapters were released once a month. The manga is more faithful tothe light novel and has scenes the anime does not.

Spin-off Manga
'Mondaiji-tachi ga Isekai Kara Kuru Sō Desu yo? Z' is a Shonen spin off manga written and illustrated by Anri Sakano. It ran in Age Premium during the run of the anime and after it. Volumes 1 and 2 take place after the events of Volume 2 of the Light Novel while Volume 3 takes place after volume 5.

Drama CD's
[http://vgmdb.net/album/45589 Mondaiji tachi ga Isekai kara Kuru soudesuyo? Drama CD "Kore ga No Name no Nichijou no youdesuyo?" ]

[http://vgmdb.net/album/45591 Mondaiji tachi ga Isekai kara Kuru soudesuyo? Drama CD "Kore ga No Name no Nichijou no youdesuyo?" Vol.2 ]

[http://vgmdb.net/album/45592 Mondaiji tachi ga Isekai kara Kuru soudesuyo? Drama CD "Kore ga No Name no Nichijou no youdesuyo?" Vol.3 ]

[http://vgmdb.net/album/45593 Mondaiji tachi ga Isekai kara Kuru soudesuyo? Drama CD "Candle to Omelette to Ghost Town Zenpen" ]

[http://vgmdb.net/album/45594 Mondaiji tachi ga Isekai kara Kuru soudesuyo? Drama CD "Candle to Omelette to Ghost Town Kouhen"]

[http://vgmdb.net/album/49451 Mondaiji tachi ga Isekai kara Kuru soudesuyo? Oretachi ga Saikyou da BD-BOX Drama CD]