Shinmai Maou no Testament

The Testament of Sister New Devil

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Alternative Titles

Synonyms: Shinmai Maou no Keiyakusha
Japanese: 新妹魔王の契約者〈テスタメント〉
English: The Testament of Sister New Devil
German: The Testament of Sister New Devil
Spanish: The Testament of Sister New Devil
French: The Testament of Sister New Devil
More titles


Type: TV
Episodes: 12
Status: Finished Airing
Aired: Jan 8, 2015 to Mar 26, 2015
Premiered: Winter 2015
Broadcast: Thursdays at 02:00 (JST)
Licensors: Funimation, Crunchyroll
Studios: Production IMS
Source: Light novel
Genres: ActionAction, FantasyFantasy, RomanceRomance, EcchiEcchi
Themes: HaremHarem, MythologyMythology
Duration: 23 min. per ep.
Rating: R+ - Mild Nudity


Score: 6.721 (scored by 338160338,160 users)
1 indicates a weighted score.
Ranked: #52432
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #282
Members: 612,074
Favorites: 1,887

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Ranked #5243Popularity #282Members 612,074
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Running into your new stepsister in the bathroom is not the best way to make a good first impression, which Basara Toujou learns the hard way. When his father suddenly brings home two beautiful girls and introduces them as his new siblings, he has no choice but to accept into his family the Naruse sisters: busty redhead Mio and petite silver-haired Maria.

But when these seemingly normal girls reveal themselves as demons—Mio the former Demon Lord's only daughter and Maria her trusted succubus servant—Basara is forced to reveal himself as a former member of a clan of "Heroes," sworn enemies of the demons. However, having begun to care for his new sisters, Basara instead decides to protect them with his powers and forms a master-servant contract with Mio to keep watch over her.

With the Heroes observing his every move and the constant threat of hostile demons, Basara has to do the impossible to protect his new family members. Moreover, the protector himself is hiding his own dark secret that still haunts him to this day...

[Written by MAL Rewrite]


Shinmai Maou no Testament adapts the first 3 volumes of Tetsuto Uesu's light novel series of the same title.

Episode Videos

Related Anime

Characters & Voice Actors


Saitou, Hisashi
Takahashi, Tsuyoshi
Sound Director
Yoshikawa, Kouji
Episode Director
Andou, Takashi
Episode Director


Opening Theme

Apple Music
Amazon Music
Youtube Music
"Blade of Hope" by sweet ARMS

Ending Theme

"Still Sis" by Kaori Sadohara

Mar 26, 2015
This is the closest harem to Highschool DxD that I've seen yet. That is a plus in my opinion although everyone seems to either hate or like this series.

The story is rather simplistic but overall interesting to see the relationships between the demons and hero clan. I think there is much more depth to be mined in future seasons.

The OP and ED are very reminiscent of Highschool DxD in both the style of animation and type of music used. The music is good and fits the show.

The characters are underdeveloped which is to be expected for a harem that consists of only ...
Dec 11, 2015
It’s quite an achievement to stumble across something so unfathomably bad that you struggle to find the right words to sum up how awful it can be. The okatu-pandering, aimless and empty Shinmai Maou no Testament fits the bill and is the latest offering to leave me speechless for the wrong reasons. It’s a self-insert power fantasy featuring a sad excuse for a cast, the bulk of which whose sole purpose is attempting to procreate with a main character who has the charisma of beige wallpaper. Perhaps the most laughably bad aspect of Testament is that there is an attempt to weave a plot into ...
Mar 26, 2015
Shinmai Maou no Testament... man this show was ALL OVER THE PLACE

One minute I'm watching and it feels like a pretty darn good action anime...which then falls apart into a mediocre "comedy" ecchi harem that borderlines hentai...

So basically the story is...
Basara is moving into his new home with his newly adopted sisters Mio and Maria. Basara is told by his father to protect his "sisters" because they are now family. All seems well until all 3 "siblings" discover that none of them are who they appear to be. Basara and his father are actually exiles from the "Hero Clan" and are natural born ...

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Recent Forum Discussion

A potential anime ruined by extreme fans service
Renaultclio101 - Jun 12, 2015
26 replies by Bionicman76 »»
Jul 23, 9:51 AM
Poll: Worth watch?
BlueCloud5 - Oct 22, 2021
22 replies by LordAinzO0alGown »»
Apr 18, 10:28 AM
How extreme is the light novel of this one?
concerned2 - Mar 31
4 replies by guritosao »»
Apr 1, 12:06 AM
I dropped this because the protagonist looks too much like ben 10
FrogFriend456 - Mar 2
20 replies by NonAtmospheric »»
Mar 10, 10:54 AM
Poll: Shinmai Maou no Testament Episode 1 Discussion ( 1 2 3 4 5 )
Stark700 - Jan 7, 2015
233 replies by THINGS59 »»
Feb 11, 8:08 PM

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