The Testament of Sister New Devil

Name: The Testament of Sister New Devil
Genre: Comedy, Action, Animation
Released: 2015-01-01
Rating: 6.8
Cast: Tomokazu Sugita, Yuichi Nakamura, Ayaka Asai, Kaori Fukuhara, Sarah Emi Bridcutt

新妹魔王の契約者

2015| 2 seasons| IMDb 6.8

The Testament of Sister New Devil (2015) is currently available in the UK on Crunchyroll. Last updated 20 January 2026.

Streaming availability last checked 20 January 2026

Comedy Action Animation

Basara Toujo 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 ens...