separated by centuries, jongdae somehow aware, writing in a desperate attempt to leave a trace that'll reach sehun if he himself can't.. sehun in the future coming across it by a sheer stroke of luck, but time travel like once space travel is reserved for the rich, the powerful, the elite among the educated. sehun struggling his way to a position within one of the companies offering time travels, as a nurse maybe, and starting to smuggle messages onto each time traveller going to the past. if jongdae could take the place of one of the travellers, they could meet in sehun's time... jongdae receiving one of the messages, a folded piece of paper falling out of someone's jacket pocket at his waiter day job, and proof of sehun being out there sending his life into turmoil; he's grown used to and fond of the longing, never quite convinced himself it was more than a strange preoccupation, cannot quite grasp that there's actually someone sometime in the future quoting his own writing back to him, along with cryptic instructions.
(sorry idk how to get to this point but) at some point their efforts somehow align but instead of one of them travelling to the other they're both yanked out of their time and stranded somewhere in between 😔 sehun initially being very cool about it.. but wait until he finds out jongdae is so much more than his writing (and that they have to build the intimacy sehun felt reading it, and it's nothing alike) all while trying to fit and settle into a time that's unfamiliar to them both.