Summary
A squad of 14 BlackWatch Mercenaries enter the "Testament of sister new devil" household then kills the loli(Maria Naruse), the maid(Zest), the sisters(Yuki and Kurumi Nonoka), captures the Heroine(Mio Naruse), and the main character(Basara Toujou). Then they collect their contract payment of 850,000 credits( 2.1 million dollars)