
Not sure for I only heard this on D***cord. There is a POV on Ruve the past, when Tia was beheaded the kingdom turned to worst.
The kingdom was already strugling but Tia was able to work around and protect Ruve. When she died, obviously all of Tia's responsibility was assigned to Jieun. But Jieun was so incompetent that Ruve kept on comparing her to Tia and then he died.
I think when Tia died, Ruve realized how Tia was helping him in the shadows even if he was so horrible to her. Serves him right the 1st Ruve. ╮( ̄▽ ̄)╭

lmao he did all that cuz he was drugged and was basically brainwashed by the Korean girl so thats why afterwards he was super guilty that he let himself go like that and kill tia. there was a part in the spoiler where ruve dies and regrets everything here -
"Ruve falls down a cliff and as he lies dying, he gazes up at the moon (the king is the sun and the moon symbolizes the queen/empress) and he thinks the moon is Tia and basically begs her for forgiveness and thinks death is not so bad since he will be reunited with Tia."
idk if you have read it yet but heres the link lol:
http://www.mangago.zone/home/mangatopic/5175109/?page=1
Umm... So I still really don't like the Prince because I feel like the justice was not served right. I really want the Past prince to feel guilty but I know that will never come true. So I'm putting all my hate to the Present prince XD.
I hope they discuss what's written in that Letter soon and about her past. And I want to slap or kill that Jitch (her fckng name + bitch) plus That fckng Duke Zena. AND FINALLY PLEASE GIVE CARSEIN A CHANCE. I think Carsein is the best choice for Tia.