Shinmai Maou no Keiyakusha (新妹魔王の契約者 Shinmai Maō no Tesutamento) is the manga series of the light novel. It was published on May 25, 2013 by Kadokawa Shoten, illustrated by Kashiwa Miyako and written by Tetsuto Uesu. An anime version in soon to be published later this year or near the beginning of 2015.


Volume 1
No. Subtitle ISBN
1 How to Conquer Your Step-Sister
Shinmai Maou no Testament
2 Demon Lord and Hero
3 The First Master-Retainer Contract
4 Between Reunion and Trust
5 In Between Reunion and Trust (part 2)
6 Enemies and Allies
7 Until You Are No Longer In Sorrow (part 1)
8 Until You Are No Longer In Sorrow (part 2)
9 Until You Are No Longer In Sorrow (part 3)
10 Things I Want To Protect
11 Unrivalled Morning Sister Demon Lord

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