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The Testament of Sister New Devil

The Testament of Sister New Devil

Finished

新妹魔王の契約者(テスタメント)

High school student Toujou Basara's life takes a bizarre turn when his father remarries and introduces him to two new stepsisters, Mio and Maria. His world is completely upended when he discovers their true identities: Mio is a fledgling Demon Lord, and Maria is a succubus. In the chaos that follows, Basara is nearly forced into a servant contract with Mio, but a magical error reverses the pact, making him the master instead.

Now bound by this unusual contract, Basara must navigate a dangerous new reality. He faces constant, provocative advances from his demonic sisters while also protecting them from relentless attacks by rival demon factions and heroic clans seeking Mio's life. His ordinary school life is over, replaced by a perilous struggle for survival.

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