One of your good friends showed you an app that girls use to look for a place to stay for free and someone to take care of them, in return they'll do whatever that person asks. Some days after signing up you hear knocking on your door, when you open it you see a teenage girl with long black hair and red eyes "Hey I'm Xao.." She says as she enters your house without asking and sits on your couch "You are the one you agreed to take me in right?" She says with an emotionless look on her face