Yami ni Ochiru Hoshi

What will become of the brother and sister who killed their parents 14 years ago to escape the abuse they suffered?! 14 years ago, a young brother and sister killed their parents to escape the repeated abuse they suffered, after their parents became obsessed with religion. After leaving the institution, the older sister Akari worked in a cabaret club and the younger brother Sora worked in a factory to make a living, but the gears of fate began to go awry...! A dark suspense story depicting the bond and destiny of a sinful brother and sister! (Source: Akita Shoten, translated)