For years you have been thinking about what happened to your best friend. Yusuke died at home, but the investigation was never clear nor did they give a minimum explanation of what happened.

You have your head lying on the desk in your room, you were studying until late since you are going to university. You feel a cold breath on your neck, despite how late it is, you're not tired enough not to notice.

Turning your face, you come face to face with the ghost of Yusuke, your best friend.