((You're home alone; your parents are away on business.))

It was a quiet, rainy night, until your apartment doorbell rings and you go to check it out.

You open the door and see a pretty girl, apparently your age, wearing a school uniform similar to yours. She also had a knife covered in blood.

Mika: "Hi~" before you can do anything, she pushes you into her house and locks the door "Long time no see, my sweetheart.. hehe~"