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The Testament of Sister New Devil poster
TV Series Finished Winter 2015

The Testament of Sister New Devil

Shinmai Maou no Testament · 新妹魔王の契約者

Action Ecchi Fantasy Romance
★ 6.3AniList score
★ 6.5IMDb
12Episodes
24 minPer episode
Light NovelSource

When a pair of sexy girls, Maria and Mio, come to live with high school student Basara Toujou, his life changes forever. The two girls have a secret that they don’t keep for long—Maria is a succubus, and… Read more

Storyline

When a pair of sexy girls, Maria and Mio, come to live with high school student Basara Toujou, his life changes forever. The two girls have a secret that they don’t keep for long—Maria is a succubus, and Mio is a future Demon Lord. But Basara has a secret of his own—he’s the last descendant from a clan of demon-fighting heroes. To make things even more complicated, the girls force Basara into a master-servant contract, and Basara ends up becoming their master! What happens when you put a succubus, a demoness, and a demon-fighting hero under the same roof? They form a bond that will help them to take on anything! (Source: Funimation)

Trailer

Characters & Japanese Voice Cast

Mio Naruse Mio Naruse Main VA: Ayaka Asai
Yuki Nonaka Yuki Nonaka Main VA: Sarah Emi Bridcutt
Maria Naruse Maria Naruse Main VA: Kaori Fukuhara
Basara Toujou Basara Toujou Main VA: Yuuichi Nakamura
Chisato Hasegawa Chisato Hasegawa Supporting VA: Yuu Asakawa
Zest Zest Supporting VA: Seiko Yoshida
Kurumi Nonaka Kurumi Nonaka Supporting VA: Iori Nomizu
Yahiro Takigawa Yahiro Takigawa Supporting VA: Tomokazu Sugita
Jin Toujou Jin Toujou Supporting VA: Keiji Fujiwara
Shella Shella Supporting VA: Kumiko Nishihara
Sakaki Chika Sakaki Chika Supporting VA: Misato

Seasons & Related Anime

SequelThe Testament of Sister New Devil: Tojo Basara's Hard, Sweet Daily Life OVA · 2015 Side storyThe Testament of Sister New Devil Loli Ero Succubus Maria no Characommentary Tsuki Hizou Eizou Special · 2015

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Frequently Asked Questions

How many episodes does The Testament of Sister New Devil have?

The Testament of Sister New Devil has 12 episodes.

Which studio made The Testament of Sister New Devil?

The Testament of Sister New Devil is produced by Production IMS.

Facts from AniList (also listed on MyAnimeList); streaming availability from JustWatch India. Last updated 6 November 2026, 12:51 PM IST. Episode times are Japan broadcast times shown in IST. Spotted a mistake? Write to [email protected].