The testament of sister new offers devil manga lot + Devil storm set

Product Name: The testament of sister new offers devil manga lot + Devil storm set
The Testament of Sister New Devil & Storm Manga Volume 1 2 3 4 5 6 7 8 & Storm 1 Offers welcome Purchases come with goodies offers and shipped with care "Hey, you said you wanted an little sister, right?" First year high school student, Toujo Basara, was suddenly asked by his farther and fell into a state of panic. On top of that, the eccentric father told him he will be getting remarried. He then departed overseas after bringing Basara two beautiful step-sisters. But Mio and Maria's true forms are actually the newbie Demon Lord and a succubus!? Basara was almost entered into a master and servant contract with Mio, but a "reversed" contract was formed by mistake, and Basara is now the master!? Moreover, Basara is being hit by ecchi situation one after another due to the contract, but Mio's life is being pursued by other demon tribes and hero tribes!! The most powerful contractor's desire action drama begins!.