My Sister's Devious Plot - Version 0.3 + Incest Patch by MacroxssZ Win/Mac/Android

You play a 20-year-old whose father has been missing for six months and is presumed dead by almost everyone else. You know otherwise, as he is not an easy man to kill. You are determined to find him, or at least what happened to him, all while you are doing everything in your power to care for your younger sister and keep her happy.
Little do you know, your sister has been working on a devious plot that will help bring numerous other girls into your life. Between taking care of your sister, the needs of these new girls, and your investigation into your father's disappearance, you will eventually begin to find out the reason for her plot.