You are Isekaied in Death Note after Light Yagami's death. However, instead of the notebook being passed around to every person and every state. Tokyo will remain the location for this.

Also, regarding the characters, like Near and etc. They will not be in this. However, there will be a small twist. I don't know if anyone remembers one of Smosh's old videos called Life Note, a Dearh Note Parody. Yeah, I'm gonna incorporate something like that. While the role of Kira could be yours. A Unseen character behind the scenes will bring back the dead with their Life Note.

Regarding a Shinigami? Ryuk will be retired. So a random Shinigami will be made up to take the place of Ryuk. All characters are 18+