The Testament of Sister New Devil (2015)

When Basara Toujou, an ordinary first-year high school student, unexpectedly finds himself sharing his home with two enchanting step-sisters, his life is turned upside down. Newcomers Maria and Mio are not your typical teenage girls. Beneath their beguiling charm lies a startling truth – Maria is a succubus and Mio is a budding Demon Lord, their ethereal beauty concealing powers darker than the deepest abyss. As their secrets unravel, Basara's seemingly mundane life transforms into an enthralling labyrinth of supernatural encounters. But Basara is not as defenceless as he appears. He is the last scion of a legendary clan of demon-slayers, a lineage steeped in valor and courage. In an unexpected twist, the sisters ensnare Basara in a master-servant contract, only to find the tables turned. Basara becomes their master, the puppeteer of a curious and intricate bond. As the master of a succubus and future Demon Lord, Basara finds himself navigating an exhilaratingly complex dynamic, one that challenges him to reconcile his demon-fighting heritage with his newfound role. "The Testament of Sister New Devil" is a seductive blend of the ordinary and the supernatural, a dance with demons under the roof of an unsuspecting hero. What unfolds is an enthralling saga of loyalty, power, and the unanticipated bonds that arise when three extraordinary lives collide. This is not your regular household – it's a potent mix of charisma, intrigue, and the undying spirit of a hero, ready to take on the world.

The Testament of Sister New Devil is an action show featuring Yuichi Nakamura and created by Hisashi Saito.

The Testament of Sister New Devil is currently streaming on Crunchyroll and Crunchyroll Amazon Channel.

It is also possible to buy The Testament of Sister New Devil on Apple TV.