New adventure of the Assistant!(Rewrite Of The Assistant's New Journey)

As the world was once fighting with might on world crises, Kimizuka kimihiko, a normal highschool boy, was now assigned to be the assistant of the legendary detective, Siesta, although he had experienced some difficulty along the way, he and his crew managed to end the world crises, but after that, his death was trailing behind him, after his death, he entered the world of supernatural beings known as spirits, what can he do to survive this new treacherous adventure now?

This is the rewriting of "The adventure of the assistant" I will use my earlier concepts but will refine them, I will add more major change later

as always as ever, all the music, art and characters used are not mine unless I say so, each belong to their respective owners