Time travel is the black (and white) impermanence of myopia or presbyopia, failing to see the names on the book of life and death clearly, attracting the wrong soul, killing the wrong person, and then giving the heroine an appearance that will overwhelm the country, and is also beaten by several extraordinary abilities?
As a new-generation ghost whose life span has expired, she does not need to be responsible for anything from black and white to King Yama.
However, when she time travels for no reason and becomes a princess who wants to defeat her stepmother, how should she survive and then stab someone in the back?
One sentence summary: The story of a princess determined to become a fighter among princesses and fight against her enemy stepmother and Mary Sue stepsister.