I like that title.
"How the hell did things end up like this"? Well, it's the natural flow of events in Hentai is all.
That ending though. Well hey, I don't think missing the last train is all that bad. After all...It means you get to spend more time with her, eh?
Not to get too nerdy, but there's a psychedelic "love song" about a woman who only shows up during rain showers: https://www.youtube.com/watch?v=yp3pXZG4VRc
To GHOE: they rode (each other) all the way to Asgard and back with a quick stop-over at Vaneheim, and this time, they remembered to take that left turn at Albuquerque.
No name revealed: either she's one of those spirit beings from Japanese folklore who comes forth when it rains, or we must apply for a sequel to find out more.