The Testament of Sister New Devil

7.9
201524m

Production

Logo for Production IMS

Toujou Basara is a high school student whose father has suddenly just remarried. His father then departs overseas leaving Basara with two new beautiful step-sisters. Little does he know, his new sisters, Mio and Maria are actually the new Demon Lord and a succubus!? Almost trapped into a life of servitude, Basara forms a reverse contract by accident and ends up becoming Mio's master! Hijinks ensue as Basara finds himself in one ecchi situation after another. However, Mio's life is in danger as she is pursued by demons and heroes!

Trailers & Videos

Thumbnail for video: The Testament of Sister New Devil (Official HD Trailer) - Anime 2015

The Testament of Sister New Devil (Official HD Trailer) - Anime 2015

Seasons

12 Episodes • Premiered 2015

When Basara Toujou's 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...

Still image for The Testament of Sister New Devil season 1 episode 1: The Day I Got A Little Sister

1. The Day I Got A Little Sister

7.6

Thanks to his father's sudden remarriage, Toujou Basara finds himself with two beautiful new step-sisters. Their names are Naruse Mio and Maria. Mio wakes him up in the morning, while Maria stands in the kitchen wearing a suggestive outfit...

Still image for The Testament of Sister New Devil season 1 episode 2: First Contract Between Servant And Master

2. First Contract Between Servant And Master

7.6

As daughter of the former demon lord, Mio's foster parents were slain by powerful demons after her life. Still seeking to slay her, Basara reveals himself as a member of the hero clan--an enemy of the demons--and vows to protect Mio as a member of his family.

Still image for The Testament of Sister New Devil season 1 episode 3: Reunion and a Gap in Trust

3. Reunion and a Gap in Trust

5.9

Basara's childhood friend Nonaka Yuuki warns him not to get involved with Naruse Mio any longer. She is a fellow member of the hero clan, and the one charged with observing Mio. She claims that Mio will bring great disaster, but Basara proclaims that he will protect Mio as a girl on his own.

Still image for The Testament of Sister New Devil season 1 episode 4: Until Sadness Reaches Zero

4. Until Sadness Reaches Zero

5.3

Basara suffers a deep wound in the battle against the white-masked man after Mio's power. Mio regrets getting Basara involved, and challenges the white-masked man to battle on her own. Meanwhile, in order to protect Mio, Basara resolves to use the "forbbiden art" he sealed away after the events of his past. What was the tragedy that visited the hero village and Basara?

Still image for The Testament of Sister New Devil season 1 episode 5: A Little Sister's Morning Demon Lording

5. A Little Sister's Morning Demon Lording

4.8

With the battle against the white-masked man settled, they returned to their bawdy daily life. Basara wakes up with his hand groping Maria's butt, he runs into a naked Mio when he enters the bathroom, and Yuki sneaks into the bath with him. The master-servant pact lying at the heart of everything. Accoring to Takigawa, his classmate and the white-masked man, the pact between Basara and Mio holds another secret. Meanwhile, Basara's childhood friend Yuki invites him out on a date...

Still image for The Testament of Sister New Devil season 1 episode 6: Bearing Growing Emotions

6. Bearing Growing Emotions

5.0

Basara goes on a date with Yuki. Unaccustomed to the shopping center, when the two of them are overwhelmed by a clerk's sales talk, Mio stops following to rescue them.

Still image for The Testament of Sister New Devil season 1 episode 7: The Depths of Love and Hatred

7. The Depths of Love and Hatred

4.8

Basara leads Mio to higher peaks as he pursues pleasure with the use of syrup. With their master-servant pact reaching a new level, they both bring their full might to face the ones trying to eliminate Mio: Takashi and Kurumi.

Still image for The Testament of Sister New Devil season 1 episode 8: Erotic Succubus Out of Control

8. Erotic Succubus Out of Control

7.7

Ten days pass since the battle with Takashi and others. Although the battle ended with reconciliation, Yuki returned to the hero's village. ...or she was supposed to, but when Basara returns home, he finds Yuki in an apron!

Still image for The Testament of Sister New Devil season 1 episode 9: Merits and Demerits of Master and Servant

9. Merits and Demerits of Master and Servant

8.0

Basara and Yuki begin the ceremony to form their pact. Clad in a bustier and garter belt, Yuki was raring to go for it, but she refused to forge the pact normally, and suffered the same succubus curse as Mio.

Still image for The Testament of Sister New Devil season 1 episode 10: Plaintive Betrayal

10. Plaintive Betrayal

7.5

Mio has been captured by Zolgia following Maria's betrayal. Basara too is captured by Lars and brought to Zolgia's mansion. Lars' goal is to exchange Basara for Mio. He explains that he's only doing his duty as Mio's observer, but negotiations fail, and Zest slays him.

Still image for The Testament of Sister New Devil season 1 episode 11: Epsionage... What Lies After

11. Epsionage... What Lies After

4.3

Strength as a human, the power to rend evil--With the power inherited from his father, Tojou Jin, Basara faces off against Zolgia. Basara is driven by the desire to protect his precious family. That desire gives him strength, and even as Zolgia pushes him to the edge, he rises without breaking. However, even Basara eventually runs out of strength facting that all too powerful might. His mind in despair, he's unable to escape from Zolgia's dominion...

Still image for The Testament of Sister New Devil season 1 episode 12: For This Night, This Moment

12. For This Night, This Moment

7.0

Everyone is trapped inside the body of the demon realm's most dangerous creature, a beast capable of infinitely multiplying until it swallows the entire world. Dimensionally cut off, the only remaining option for Basara and the others is to completely eliminate this dangerous creature's vital core.

Cast

Photo of Yuichi Nakamura

Yuichi Nakamura

Basara Tojo (voice)

Photo of Ayaka Asai

Ayaka Asai

Mio Naruse (voice)

Photo of Kaori Fukuhara

Kaori Fukuhara

Maria Naruse (voice)

Photo of Tomokazu Sugita

Tomokazu Sugita

Yahiro Takigawa (voice)

Photo of Yuu Asakawa

Yuu Asakawa

Chisato Hasegawa (voice)

Photo of Iori Nomizu

Iori Nomizu

Kurumi Nonaka (voice)

Photo of Sarah Emi Bridcutt

Sarah Emi Bridcutt

Yuki Nonaka (voice)

Photo of Keiji Fujiwara

Keiji Fujiwara

Jin Tojo (voice)

Photo of Seiko Yoshida

Seiko Yoshida

Zest (voice)

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