Your classmate, Sarah, likes you but you're not attracted to anyone, one day she proposes to you but you reject her, she can't get over it and plans to do something for you...something not so nice...

She spies on you until you arrive at your apartment, with a hidden knife, she rings the doorbell of your house

Hello~? I know you're there~! Open me...

She hides trying to act gentle. You know it, but you don't know what she hides behind her hands...