I've storytelled Changeling the Lost one-shot!
Players were changelings, still in Arcadia, who one "day" awoke to their usual place becoming a vast ocean with ruins of modern buildings sticking out here and there. Their Keepers disappeared, and so they decided this is their chance to escape Arcadia for good.
Stökk, Raud and Tauma – three changelings from different times and places, who banded together in Arcadia to become some sort of pirates. Only they aren't unnecessary cruel, so they easily switched from trying to rob players into cooperating with them to get... rocks. Because normal rocks are rare in this water-concrete post-apocalypse. And because they are a frailty of one of local True Fae, Mortician.
Stökk is a way too good swimmer who swam into Arcadia while trying to cross a dangerous river. Raud is an actual pirate from 18th century, who was obsessed with finding new land and eventually found Arcadia. And Tauma is simply a marine biologist who looked into sea too eagerly, bringing attention of True Fae onto herself. By the end of one-shot, player saved this trio alongside themselves.
Pythia and Jules. Pythia is an oracle who forsaw his own death not long before players arrived. Pythia is a former lover of Mourner, local True Fae, and they fall in love easily, most of their beloved dying the moment they move on, either to heartbreak, to environment or to jealous Mortician. Pythia survived due to his insane luck and sharp mind, and for a long time he was trying to help people Mourner dragged to Arcadia. Fruitlessly, unfortunately. Players prevented his death and helped him escape with them in the end.
Jules is a new beloved of Mourner, who has spent only several hours in Arcadia, hence his human appearance. He didn't understand what was going on, thinking it to be a mere dream. Pythia helped him survive and hid him from Mourner, before the truth came out and Mourner tried to drown everyone in their tears. That's where Pythia was about to die, and Jules finally understood that this not a mere dream afterall. Players got him out as well.
And now onto True Fae of this game:
A Leviathan-type creature (literally, ocean boils around them) using their appendage with human-like scales to pretend to be less of a threat than they are. Madly "in love" with Mourner and spent their days imprisoning Deceased, first beloved of Mourner and another True Fae, before Deceased escaped and the cycle began anew. All three Fae were having something like fun living in this cycle, before Mourner broke it by falling in love with a mortal human, thus making other two realise humans exist as well.
Mortician chased after players, trio of pirates, Pythia and Jules (all crowded on one boat) in the game's finale. But players managed to slow Mortician down with a candy that was inedible for anyone who wished to harm someone (it's a reworked goblin fruit from the 2e book) and rocks. Yeah. And when the bastard trashed around, one of waves created carried everyone out of Arcadia safety. Hooray.
A True Fae who started this whole mess when they began to take in human lovers, making Mortician and Deceased realise humans existed in the first place. After that all three began capturing humans somewhat regularly for their own reasons.
Mourner almost drowned everyone in their tears upon realising Pythia lied to them about whereabouts of Jules, but players distracted her with Deceased, their original lover, and escaped on the nearby boat.
Mourner's original lover, a True Fae who got bored of being constantly imprisoned by Mortician on their "beloved's" behalf long time ago and especially after Mourner starting taking lovers among humans.
Deceased seeked to leave Arcadia, or at least this part of it, for a long time. Players initially assumed Deceased was another changeling and agreed to make a deal with them, thus learning about the way out, but promising to assist Deceased and not to leave them when faced with trouble from other Gentry.
In the end, upon realising what Deceased truly was, players fed them another reworked goblin fruit, fish who made Deceased lose their fear. So Deceased went to get revenge from Mourner, and players escaped, technically not breaking the bargain.
And lastly, a guy who greeted players upon them emerging on their boat in Amsterdam's canals at night.
Adlar, King of Summer in local freehold. He hasn't actually been to Arcadia, but because he is a son of mortal woman and banished Gentry (so-called Charlatan) (a fact Adlar abhors and hides to the best of his ability) he is still technically a Changeling stuck in this whole changeling business. He welcomed newcomers in and invited them to local sport complex, owned by Summer Court, to stay the night, and the game ended on this happy note.
I actually added him the night before the actual game, because one of my players, who played with me before, asked if he'd appear. And I said "oh yeah! of course! I've totally accounted for that!" and went to draw him at 1 am. That's why Adlar's sprite looks better than previous ones, which were ready a month before the game. But I like this, since Adlar appears in reality, unlike all others whom players saw in Arcadia.
There was also a map, drawn by Raud in-universe, but Tumblr doesn't allow more than 10 images per post, so yeah. That's it. Thanks for looking at my guys.