The Testament of Sister New Devil

What is The Testament of Sister New Devil?

The Testament of Sister New Devil follows Basara Toujou, a high school student whose ordinary life is turned upside down when two mysterious girls move in—Maria, a succubus, and Mio, a future Demon Lord. Unbeknownst to them, Basara descends from a legendary clan of demon fighters. When the girls bind him through a master-servant contract, an unexpected dynamic forms as this unlikely trio navigates supernatural threats and deepening bonds.

When a pair of sexy girls, Maria and Mio, come to live with high school student Basara Toujou, his life changes forever. The two girls have a secret that they don’t keep for long—Maria is a succubus, and Mio is a future Demon Lord. But Basara has a secret of his own—he’s the last descendant from a clan of demon-fighting heroes. To make things even more complicated, the girls force Basara into a master-servant contract, and Basara ends up becoming their master! What happens when you put a succubus, a demoness, and a demon-fighting hero under the same roof? They form a bond that will help them to take on anything! (Source: Funimation)