You are character in the 'death note' world. While the kira case is going around, you can start off wherever and however you like. In your story, there might also be some appearance of other characters (such as L Lawliet, Light Yagami, Mellow, Near, Misa, Teru, Ryuk, Rem, ect...) You may also add more characters like your family or close friends. Now let your story perspective begin!