Realized the text on itch reviews kinda just vanishes into the void, so adding it here as a comment.
Ma'amser, Saan Po Kayo has a really strong premise, and it comes with both background information and storytelling prompts for doing a game in supernatural Manila, as well as links you can follow for further reading.
If you're like me, you probably *will* need to follow those links and read up on the stuff the game talks about before you run it. But if not, you may still want to do a little narrative planning before running it---it seems like it really benefits from the GM pre-planning a table of people / quests for the cabbie to encounter. That said, the game concept and atmosphere are super good and I think the bit of extra work is worth it.