As of July 2026, The Testament of Sister New Devil is a Animation series that aired since 2015 with 2 seasons — streaming now on Crunchyroll. Find out where to watch it below.
The Testament of Sister New Devil poster

The Testament of Sister New Devil

2015 2 Seasons 22 Episodes Animation R 18+ ⭐ 8 / 10

The Testament of Sister New Devil has quietly become one of the more dependable comedies currently available in the US on Crunchyroll, and in the UK on Crunchyroll. Every one of its 2 seasons holds up. Its 8/10 TMDB score, built from 362 ratings, reflects a title that consistently delivers. Yuichi Nakamura leads a cast with real comic timing. Start it on Crunchyroll whenever you need something guaranteed to land.

The Testament of Sister New Devil is not trying to be everything to everyone, and that focus is exactly what makes it work. The Testament of Sister New Devil gets the fundamentals right first, then finds room to get weird with it. 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!? Yuichi Nakamura and Ayaka Asai lead a cast with the timing to make it work. The series ran for 2 seasons from 2015, building a story that gave its audience time to invest properly. The Testament of Sister New Devil earns its laughs from character rather than situation, which is why it does not wear thin the way pure farce tends to. The consistency throughout is what elevates it — not every moment is the best, but none of them are a reason to stop watching.

The Testament of Sister New Devil is the kind of thing you put on in the background and end up fully watching. Hybrid x Heart Magias Academy Ataraxia is the obvious comparison, but The Testament of Sister New Devil earns its own place alongside it. The complete run is available and best experienced without too much prior knowledge of where it goes. Yuichi Nakamura is funny in a way that holds up on rewatch. Put it on when you need something guaranteed to land.

The Testament of Sister New Devil wrapped up in 2015 — and 2 seasons are available to watch from start to finish. Find exactly where it's streaming below, and TV Butler Pro's free voice app makes it effortless to track your progress as you go. Just say the name, and Butler finds it instantly, tells you which service has it, and remembers exactly where you left off.

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📺 Where to Watch The Testament of Sister New Devil

United States

United Kingdom

Canada

🎭 Cast of The Testament of Sister New Devil

Yuichi Nakamura
Yuichi Nakamura
Basara Tojo (voice)
Ayaka Asai
Ayaka Asai
Mio Naruse (voice)
Kaori Fukuhara
Kaori Fukuhara
Maria Naruse (voice)
Tomokazu Sugita
Tomokazu Sugita
Yahiro Takigawa (voice)
Yuu Asakawa
Yuu Asakawa
Chisato Hasegawa (voice)
Iori Nomizu
Iori Nomizu
Kurumi Nonaka (voice)
Sarah Emi Bridcutt
Sarah Emi Bridcutt
Yuki Nonaka (voice)
Keiji Fujiwara
Keiji Fujiwara
Jin Tojo (voice)

🗂️ All Seasons of The Testament of Sister New Devil

1
Season 1
12 Episodes · 2015
2
Season 2
10 Episodes · 2015

📋 If You Like The Testament of Sister New Devil, Try These

Hybrid x Heart Magias Academy Ataraxia
2016
The Qwaser of Stigmata
2010
Chained Soldier
2024
Harem in the Labyrinth of Another World
2022
Sekirei
2008
Peter Grill and the Philosopher's Time
2020

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