The Eldest Princess Is Here, the Evil and Charming Wife of the Sinister Prince.

An eldest princess who was born noble and had the abilities of a man was suffering from illness and had to marry the royal family's candidate. The other was a "dandy" known to everyone in the capital. When the two collided and were entangled in imperial power, family affection and love, maybe everything was an arrangement of fate... How will they get through the fog and pursue their own lives? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.