Mirabelle encountered a lot of calamities from a young age. Her parents had been killed right in front of her when she was just eighteen and she was taken as captive by the head of a notorious assassin gang. There, she was forced to lose her virginity in the worst possible way to a total stranger who happened to be one of the popular assassins in the organisation. She would never have expected that her first mission ever would be to seduce the well-known Phantomhive twins. The boss lady said to her,\'Seduce one of them! And have his baby or get killed!\' How is she supposed to seduce one of the feared Phantomhive twins and have his child!? Which one of them would fall for her charm!? Will any of them even fall for her?