The Testament of Sister New Devil
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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!
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Yuichi Nakamura, Ayaka Asai, Kaori Fukuhara, Tomokazu Sugita, Yuu Asakawa, Iori Nomizu, Sarah Emi Bridcutt, Keiji Fujiwara, Seiko Yoshida
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The Testament of Sister New Devil
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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!
Cast
Yuichi Nakamura, Ayaka Asai, Kaori Fukuhara, Tomokazu Sugita, Yuu Asakawa, Iori Nomizu, Sarah Emi Bridcutt, Keiji Fujiwara, Seiko Yoshida
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The Testament of Sister New Devil is streaming on Crunchyroll. The Testament of Sister New Devil is streaming on Crunchyroll Amazon Channel. Buy The Testament of Sister New Devil on Apple TV Store. Availability last verified February 25, 2026.
