Shinmai Maou no Testament

Japanese Title 新妹魔王の契約者
Author Tetsuto Uesu
Illustrator Nekosuke Ookuma
Genre Action, Comedy, Fantasy, Romance
Target Readership Male
Volumes 5

Associated Titles

Shinmai Maou no Keiyakusha
The Testament of Sister New Devil

Publication Labels

- Kadokawa Sneaker Bunko (Kadokawa Shoten)
  October 01, 2012 - ongoing (5 volumes)


"Hey, you said you wanted an little sister, right?" First year highschool student, Toujo Basara, was suddenly asked by his farther and fell into a state of panic. On top of that, the eccentric father told him he will be getting remarried. He then departed overseas after bringing Basara two beautiful step-sisters. But Mio and Maria's true forms are actually the newbie Demon Lord and a succubus!? Basara was almost entered into a master and servant contract with Mio, but a "reversed" contract was formed by mistake, and Basara is now the master!? Moreover, Basara is being hit by ecchi situation one after another due to the contract, but Mio's life is being pursued by other demon tribes and hero tribes!! The most powerful contractor's desire action drama begins!

Source: My Anime List


Shinmai Mahou no Testament I

Volume: 1
Release Date: October 01, 2012
Pages: 299
ISBN-10: 4041004950
ISBN-13: 978-4041004951
Height (cm): 15.00
Width (cm): 10.80
Thickness (cm): 2.20
Online Shops: Amazon Japan
Shinmai Mahou no Testament II

Volume: II
Release Date: January 31, 2013
Pages: 2990
ISBN-10: 4041006708
ISBN-13: 978-4041006702
Height (cm): 14.80
Width (cm): 10.60
Thickness (cm): 2.00
Online Shops: Amazon Japan
Shinmai Maou no Testament III

Volume: III
Release Date: May 31, 2013
Pages: 328
ISBN-10: 4041008603
ISBN-13: 978-4041008607
Online Shops: Amazon Japan
Shinmai Maou no Testament IV

Volume: IV
Release Date: October 31, 2013
Pages: 328
ISBN-10: 4041010616
ISBN-13: 978-4041010617
Online Shops: Amazon Japan
Shinmai Maou no Testament V

Volume: V
Release Date: March 30, 2014
Pages: 360
ISBN-10: 404101297X
ISBN-13: 978-4041012970
Online Shops: Amazon Japan