Shinmai Maou no Testament Burst  

Shinmai Maou no Keiyakusha Burst, The Testament of Sister New Devil Burst, 新妹魔王の契約者 BURST, 新妹魔王的契约者 BURST, The Testament of Sister New Devil: Burst

Basara toujou faces many challenges as he serves as the older step-brother to two demonic sisters, mio and maria naruse. he is responsible for protecting them from entitled demons seeking to exploit mios power. additionally, political tensions within the demon realm intensify his responsibilities. when a messenger arrives with summons for mio to appear in the demon realm, she and her friends decide to go despite the danger. now on enemy territory, basara must rely on erotic pleasure to gain strength and successfully protect everyone involved.

Shinmai Maou no Testament Burst adapts volumes 4 to 7 of Tetsuto Uesus light novel series of the same title.