The Boy Outside My Window

A girl with a pretty decent life, with pretty decent grades, and pretty decent friends lives on the second floor of her home, with a balcony outside her room. She has what she truly hopes is just an imaginary friend, for the sake of her privacy, but some things begin happening. She will wake up and her stuff will be moved around, and sometimes she wakes up in the middle of the night and sees a swift streak of blue outside her window. When she manages to catch the culprit, what happens is fascinating.