I'm gonna be honest with y'all. I LOOOVVE this show but it breaks my heart to say that I don't think this is going…
I'm actually already preparing my heart. Sageuks and their sad endings or heartbreaking storylines. Maybe BJH will somehow change something in the past so when he comes back in the future, I think he'll wake up as still him/her but it's now Shin Hye Sun and not Choi Jin Hyuk's body. He/she then meets the reincarnation of the King and that's the happy ending. I haven't watched the Chinese version but I think several mentioned there are at least 3 alternate endings.
https://youtu.be/lrJ66iZkNyE
**Netflix is going all out with their Kim Seon Ho-Han Ji Pyeong contents XD
https://www.reddit.com/r/KDRAMA/comments/k8gn0f/review_megathread_startup/