The show should have done more to make it obvious that SoYoung was always there.
I'm wondering if it ended where it did because it's a perfect set-up for a Chapter 2.
The actors did such a great job with an especially outstanding performance by shin hye-sun.
Bonghwan thought he gets poisoned so he offered the king his cup, the king catch on that so he drink it but also share it with lips, it isn't meant as kiss but forcing them both to drink both the wine to see that there is no deadly poisoned there.
I would rather he face a decision of change himself in the end, so the butterfly theme would have been stronger.
Am hoping and hoping for a reincarnated 2021 Cheoljong, but show only offers open ending via the special 2 episodes, sad.