My Sweet Sadistic Sister

After living alone with your dad for the past ten years, he has some news—he's getting married and you're getting a stepsister! Fortunately, it turns out that she's one of the kindest girls in your school… or so you thought. Turns out she's a sadistic bully, and now she's blackmailing you! Will you be able to keep this secret from your best friend and the classmate you're ordered to spy on? How w...