The Testament of Sister New Devil (2015)
Audiences love it.
The FilmyChill Score combines audience ratings and critics' reception, and updates twice a day. No studio or platform can pay for a score. How the score works
The Testament of Sister New Devil is streaming in Japan on U-NEXT, Anime Times, dAnime.
What the audience says
The Testament of Sister New Devil sits near the top of Japanese series on audience ratings. It carries a 7.9/10 on TMDB across 372 ratings — comfortably clear of the pack. Episodes clock in around 24 minutes. In Japan you can stream it on U-NEXT, Anime Times, dAnime.
Is it worth starting?
This is 2 seasons deep — Japanese animation, leaning action & adventure.
- Why
- It rates 7.9/10 on 372 ratings so far — a strong early showing.
- Skip if
- animation isn't your thing
- Best for
- An episode-a-night rhythm
Story
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!
Good to know
| Runtime | ~24 min per episode |
| Genre | Animation / Action & Adventure |
| Language | Japanese |
| Best screen | Stream at home |
Cast
Where to watch in Japan
Included with a subscription — no extra charge on these platforms.
Availability as of 21 Oct 2026 — platforms may change over time.
More: All U-NEXT titles in Japan
Trailer
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