Shinmai Maou no Keiyakusha


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“Hey, you said you wanted a little sister, right?”

First year highschool student, Toujo Basara, was suddenly asked this question by his father, and he fell into a state of panic. On top of that, the eccentric father told him that 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 a newbie Demon Lord and a succubus!? Basara was almost forced 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 situations 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!

Associated Names
One entry per line
Shinmai Maou no Testament
The Testament of Sister New Devil
Related Series
(Um, Sorry) I’ve Been Reincarnated!
10 nen goshi no HikiNiito o Yamete Gaishutsushitara Jitaku goto Isekai ni Ten’ishiteta
A Certain Middle-Aged Man’s VRMMO Activity Log
A Martial Odyssey
A Thought Through Eternity

Latest Release

Date Group Release
08/03/18 zxzxzx v8c1
11/03/17 zxzxzx v7 afterword
11/03/17 zxzxzx v7 epilogue
10/23/17 zxzxzx v7c4
05/05/17 zxzxzx v7c3
10/11/16 zxzxzx v7c2
01/21/16 Baka-Tsuki v9 illustrations
06/11/15 Baka-Tsuki v8 illustrations
06/24/16 Baka-Tsuki v7c1 part2-3
04/27/16 Baka-Tsuki v7c1 part1
01/18/16 Baka-Tsuki v7 prologue part4
01/18/16 Baka-Tsuki v7 prologue part3
12/31/15 Baka-Tsuki v7 prologue part2
12/28/15 Baka-Tsuki v7 prologue part1
01/18/15 Baka-Tsuki v7 illustrations
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4 Reviews sorted by

nobelvampire1071 rated it
May 12, 2016
Status: --
Well if you like shounen and typical MC which is the type to never give up and protect all etc this is for you. MC is strong but not overpowered.

Also there are lot of scenes bordering on hentai. Each girl has their own separate arc where he saves them.

In general this is a typical shounen slice of life harem anime with your average MC. Well a special point about MC is he is not afraid of killing.

He killed zelrog or some1 I forgot the name by giving him to some other guy to torture and then came to see himself while the other guy killed him. That was fun

Its fun to read.
8 Likes · Like Permalink | Report
cpkdillon rated it
July 5, 2017
Status: v9 illustrations
This is a great fan service/action novel and continues to improve as time goes on. But if your not interested in fan service (even if its the most well done I have read) then this is obviously not for you. There is also a good anime adaption.
4 Likes · Like Permalink | Report
mechafanboy rated it
November 1, 2016
Status: v3
Fanservicey to the point that the novel literally spends a large portion of pages (probably 20% at least per volume) talking about fanservicey nonsense.

There's an underlying plot, but frankly it's annoying wading through the all the nonsensical bs to get to the plot. The rating might be slightly harsh but that's primarily because I personally feel annoyed with how slow the plot progresses not due to additional character building but rather needless s*xual gratification.

We get it, he's surrounded by pretty girls and most of them want to be his slaves.... more>> Stop writing a paragraph about it every chapter and maybe the novel's pacing wouldn't be completely horrible. <<less
2 Likes · Like Permalink | Report
PhantomLily rated it
June 24, 2016
Status: v7c1
Fantastic novel and plot. Always loved the Angel, Hero, and Demon kind of thing. Nice action between the MC and his girls too ;)
2 Likes · Like Permalink | Report
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