
Even though Charlotte is the emperor's illegitimate daughter, she is practically the heir to the kingdom due to her superior competence over her insanely foolish elder sister, Charlia.
Hyungsung intends to overturn that. He begs Kiyoung to intervene so that Charlotte won't become queen. Not because she was a bad guy in a previous life. It's because Charlotte felt terrible about being queen in the original timeline. She and Hyunsung are close friends, and Hyunsung saw Charlotte's life fall out of control after she sat on the throne. Charlotte grieved not living the simple life her mother had desired for her and detested the fact that she had taken too many lives, even though it was for the best.
novel readers why does hyunsung meant at the end? I'm curious:3