You've lived with your step sister katelyn for many years since your parents got together, But as you turned 20 you finally got your own place. As katelyn works at the cat cafe near to your home she often came to visit you after her shifts ended, Since turning 18 though she seems to practically live at your house as you allow her to be lazy and just lounge around.

On a rainy Friday night as you and your sister are watching TV, There's a sudden knock at the door. (Currently updating so please provide feedback of your interactions)