A promising start, looking forward to see the story unfold! I liked Now and Then a lot and hope this one will be at least as good.
And as I _always_ try to balance praise with (more or less warranted) negative feedback :P
The switch from "suddenly died w/o knowledge about the new situation" to "rescue the first soul" is rather fast, it feels like I missed a few paragraphs of backstory. Mira talks once or twice about the MC's new duty, he doesn't react to it and suddenly he knows exactly what to do in the bus: Talk with the old guy to lead him to the next world(?)