The Testament of Sister New Devil has arrived on Crunchyroll, offering a complete 12-episode binge for those looking for a quintessential mid-2010s supernatural harem. The series follows Basara Toujou, a high schooler whose life is upended when his father suddenly remarries and leaves him with two stepsisters who turn out to be a demon princess and her succubus attendant.
Produced by the now-defunct Production IMS, the show leans heavily into the tropes of the era, blending high-stakes urban fantasy combat with a relentless focus on its harem dynamics. The plot centers on the master-servant contract between Basara and his new family, a magical bond that serves as the catalyst for both the series' recurring action sequences and its provocative, fan-service-heavy aesthetic.
For those who enjoy the specific sub-genre of 'battle harem' anime, the show delivers exactly what the genre promises: escalating supernatural threats, complex magical weapon systems, and a protagonist tasked with protecting his charges from various demonic factions. It is a series that wears its influences on its sleeve, prioritizing character interactions and high-energy transformations over intricate world-building.
This release includes both the original Japanese audio with subtitles and an English dub. As a complete series from the Winter 2015 season, it serves as a self-contained entry point for the franchise, though viewers who find themselves invested in the characters can continue the story through the subsequent sequel, The Testament of Sister New Devil: Burst, and the various OVAs that followed.
While the show is firmly rooted in the ecchi genre, it maintains a consistent pace that keeps the narrative moving through its initial three-volume adaptation. It is a straightforward recommendation for viewers who prioritize character-driven harem dynamics and supernatural action, provided they are prepared for the series' unapologetic focus on fan service.
