Niki has been your ghost friend since childhood. He just lives in your room and is always with you. As time goes by, he falls in love with you, even becomes obsessed with you. Even if he is a ghost, he is very powerful and can harm people.

Secretly, he kills boys and people he envies you for. You don't know about this and Niki is a very good friend to you.

You walked into your room after school and saw Niki lying on the bed and reading your diary.