The BEST episodes of The Testament of Sister New Devil season 1

Every episode of The Testament of Sister New Devil season 1, ranked from best to worst by thousands of votes from fans of the show. The best episodes of The Testament of Sister New Devil season 1!

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!

Last Updated: 3/15/2024Network: Tokyo MXStatus: Ended
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Until Sadness Reaches Zero
star
8.35
165 votes

#1 - Until Sadness Reaches Zero

Season 1 - Episode 4 - Aired 1/29/2015

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?

Directors: Hisashi Saito
Watch Now:Amazon
Plaintive Betrayal
star
8.30
142 votes

#2 - Plaintive Betrayal

Season 1 - Episode 10 - Aired 3/12/2015

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.

Directors: Hisashi Saito
Watch Now:Amazon
The Depths of Love and Hatred
star
8.22
143 votes

#3 - The Depths of Love and Hatred

Season 1 - Episode 7 - Aired 2/19/2015

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.

Directors: Hisashi Saito
Watch Now:Amazon
Erotic Succubus Out of Control
star
8.06
144 votes

#4 - Erotic Succubus Out of Control

Season 1 - Episode 8 - Aired 2/26/2015

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!

Directors: Hisashi Saito
Watch Now:Amazon
For This Night, This Moment
star
8.03
154 votes

#5 - For This Night, This Moment

Season 1 - Episode 12 - Aired 3/26/2015

As Yuki fends off any enemy approaching the core, Basara, Mio and Zest soon fight against a horde of Zest's clones. The group arrives at the core and Zest offers herself as bait for Basara to kill the beast. In doing so, however, Basara protects Zest and disables the vital core with his Banishing Shift, thus killing the beast. As the girls recover, Basara witnesses Yahiro/Lars executing Zolgear. Back at their home, Zest places her loyalty to Basara. Greatly opposed to the fact of someone else stealing Mio's virginity, Basara and Mio engage in lovemaking until Basara stops mid-way, apologizing for forcing himself unto Mio. As Basara and Mio were about to kiss once more, Yuki interferes and steals Basara's lips and is accompanied by Zest. As Mio and Yuki argue over Basara, the latter runs to Maria and asks her to help him appease the two. Adding to the uproar, Maria lunges at Basara and kisses him. Shella and Zest were then put under the care of the demons from the moderate-faction. Meanwhile, word of Zolgear's death eventually reaches Demon Lord Leohart as he faces Jin Tōjō in his throne.

Directors: Hisashi Saito
Watch Now:Amazon
Bearing Growing Emotions
star
7.99
150 votes

#6 - Bearing Growing Emotions

Season 1 - Episode 6 - Aired 2/12/2015

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

Directors: Hisashi Saito
Watch Now:AmazonApple TV
Merits and Demerits of Master and Servant
star
7.99
139 votes

#7 - Merits and Demerits of Master and Servant

Season 1 - Episode 9 - Aired 3/5/2015

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.

Directors: Hisashi Saito
Watch Now:Amazon
Espionage... What Lies After
star
7.97
142 votes

#8 - Espionage... What Lies After

Season 1 - Episode 11 - Aired 3/19/2015

Strength as a human, the power to rend evil--With the power inherited from his father, Toujou 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...

Directors: Hisashi Saito
Watch Now:Amazon
A Little Sisters’ Morning Demon Lording
star
7.92
156 votes

#9 - A Little Sisters’ Morning Demon Lording

Season 1 - Episode 5 - Aired 2/5/2015

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...

Directors: Hisashi Saito
Watch Now:Amazon
Reunion and a Gap in Trust
star
7.82
170 votes

#10 - Reunion and a Gap in Trust

Season 1 - Episode 3 - Aired 1/22/2015

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.

Directors: Hisashi Saito
Watch Now:Amazon
First Contract Between Servant and Master
star
7.81
177 votes

#11 - First Contract Between Servant and Master

Season 1 - Episode 2 - Aired 1/15/2015

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.

Directors: Hisashi Saito
Watch Now:AmazonApple TV
The Day I Got a Little Sister
star
7.29
214 votes

#12 - The Day I Got a Little Sister

Season 1 - Episode 1 - Aired 1/8/2015

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...

Directors: Hisashi Saito
Watch Now:Amazon