GVG-388 An obedient and masochistic older sister and a provocative and sadistic younger sister

My younger sister Hikaru crosses the line between being a parent and child when she is alone with her father-in-law. One day, when her sister Haruka comes home, she finds Hikaru and her stepfather having sex... When Haruka tells her father-in-law about it, her father-in-law comes much closer to shutting him up and eventually has an affair. A bizarre love triangle between a beautiful sister and her father-in-law was about to begin...