The Testament of Sister New Devil (2015)
Kernel Score: 84% · 343 ratings
Genres: Animation, Action & Adventure, Comedy, Sci-Fi & Fantasy
First aired: 2015-01-07
Seasons: 2 · 22 episodes
Where to watch The Testament of Sister New Devil
- Stream: Crunchyroll
- Buy: Apple TV
US availability, updated 2026-10-22.
Overview
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!
The Testament of Sister New Devil parents' guide: ages 15+
Parents need to know that The Testament of Sister New Devil is a TV-MA ecchi anime featuring sexualized fan-service situations between a teen boy and his demon stepsisters.
- Violence & scariness: Moderate — Supernatural demon-hunter premise involves fantasy combat and danger from pursuing demons and heroes.
- Sex, romance & nudity: Strong — Keywords describe frequent 'ecchi' fan-service and harem-style sexualized situations between the teen protagonist and his stepsisters.
Fresh Kernels AI-assessed from the official TV-MA rating, publicly documented content. A guide for families, not an official rating.
Shows like The Testament of Sister New Devil
If you liked The Testament of Sister New Devil, these are the shows we'd watch next.
- Hybrid x Heart Magias Academy Ataraxia (2016) — 86%
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- So, I Can't Play H! (2012) — 83%
- Demon King Daimao (2010) — 84%
- How Not to Summon a Demon Lord (2018) — 84%
- ORESUKI Are you the only one who loves me? (2019) — 89%
- Campione! (2012) — 85%
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Cast
- Yuichi Nakamura as Basara Tojo (voice)
- Ayaka Asai as Mio Naruse (voice)
- Kaori Fukuhara as Maria Naruse (voice)
- Tomokazu Sugita as Yahiro Takigawa (voice)
- Yuu Asakawa as Chisato Hasegawa (voice)
- Iori Nomizu as Kurumi Nonaka (voice)
- Sarah Emi Bridcutt as Yuki Nonaka (voice)
- Keiji Fujiwara as Jin Tojo (voice)
- Seiko Yoshida as Zest (voice)
The Testament of Sister New Devil FAQ
Is The Testament of Sister New Devil good?
The Testament of Sister New Devil has an 84% Kernel Score on Fresh Kernels from 343 audience ratings.
Where can I watch The Testament of Sister New Devil?
In the US you can stream The Testament of Sister New Devil on Crunchyroll and buy it from Apple TV.
Is The Testament of Sister New Devil OK for kids?
The Testament of Sister New Devil is rated TV-MA. Fresh Kernels suggests ages 15+. Parents need to know that The Testament of Sister New Devil is a TV-MA ecchi anime featuring sexualized fan-service situations between a teen boy and his demon stepsisters.
What shows are like The Testament of Sister New Devil?
If you liked The Testament of Sister New Devil, try Hybrid x Heart Magias Academy Ataraxia, Combatants Will Be Dispatched!, So, I Can't Play H! and Demon King Daimao.