The Testament of Sister New Devil
On Tokyo MX
A high-energy supernatural harem comedy that balances ecchi hijinks with genuine romantic stakes and occasional action, sustained across 22 episodes of episodic escalation.
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!
Clusters
Where to watch
- StreamCrunchyroll
- BuyApple TV Store
Questions people ask
Is The Testament of Sister New Devil one of a kind? No. Less singular than 91% of series.
Is The Testament of Sister New Devil sad? Barely. Less sad than 80% of series.
Does The Testament of Sister New Devil leave you hopeful? Somewhat. More hopeful than 69% of series.
Is The Testament of Sister New Devil easy watching? Somewhat. More comforting than 61% of series.
Is The Testament of Sister New Devil scary? Not especially. Less frightening than 59% of series.
Is The Testament of Sister New Devil violent? About average. Almost exactly mid-range.
These describe how the series comes across across its whole run, compared with other well-known series. They are not a content list — nothing here was counted or checked episode by episode, so for age-suitability or specific content use a classification board or a dedicated content-warning service.
Cinnamon Score
How much this series gives you that nothing else will, and whether it delivers.
You have seen this shape before.
How unlike any other series this one feels
How much more it delivers than it promises
How much audiences actually like it
Ensemble
Everything like The Testament of Sister New Devil, and what each one shares →
Like The Testament of Sister New Devil
Nearest across the full emotional profile.
Same Mood as The Testament of Sister New Devil
Nearest on what's most distinctive about this one.
Like The Testament of Sister New Devil, But Darker
Similar, pushed toward heavier and more intense.
Like The Testament of Sister New Devil, But Lighter
Similar, pushed toward warmer and easier.
Like The Testament of Sister New Devil, But Less Popular
Same territory, far fewer people have seen it.
