The Princess Marries a Profligate Heir, Then Plots to Usurp the Throne

She is a master poison doctor from the 23rd century. In a single day, she transmigrates into the body of an unloved eldest legitimate princess of the royal family.

Her father treats her as a stepping-stone to clear the way for her younger sister. Then an imperial edict marries her off to a notorious playboy in the capital whom everyone avoids. Everyone is waiting to laugh at her, and everyone is waiting for her to fall.

But she will defy fate and become the one pulling all the strings!

She will scheme for the throne, control life and death, and carve out a path in life that belongs to her alone.

But you, the playboy young heir who married me, why are you playing the same game as I am, and trying to control the same world?