This was delightful! I only skimmed the authors' notes, so I was pleasantly surprised to be reminded of Spirited Away. I clued in when our train ran out over the top of the water. :)

All the way through, you did a great job of conveying the otherworldliness of the Underworld using building block recognizable from ours. Of course Pluto has a casino. Of course.

I think my favorite part, though, was the gradual reveal of the love story. Jensen's slow self-discovery was lovely. I don't recall running across that many fics that give the kind of careful attention that you did here to those moments of epiphany. And then when he finally turned around on the platform and there was Jared, and they got a big wonderful hug, I felt like I was in on the hug, too.