Boku ga Imouto wo Korosu made

Mikoto is a beautiful girl who dazzles anyone who sees her. For Masahide, who lost his parents, his younger sister Mikoto is the only "family" he has. One night, however, Mikoto kills a man in front of Masahide's eyes. Innocent love spirals out of control, and the ultimate incestuous suspense begins!

(Source: Shougakukan, translated)