From Aerandria Scans:
Roochen and Galnia are two countries that have been at war with each other for a long time. Now that peace has been established, princess Aldina of Roochen has to marry the prince of Galnia. However, according to the rumors, the prince of Galnia is a total debauch, and he does nothing but playing around?! Aldina wants to see for herself who the prince really is, so she disguised herself as a boy and tried to approach the prince...

From StarryHeaven:

Yuurin, the daughter of a low ranking government officer, came to the royal palace after hearing of a job with higher wages. However, that job is to act as the bride of Haku Reishou, who is feared as being the ruthless and heartless "His Majesty, the Wolf". In the royal palace where conspiracies swirl, after learning His Majesty's secret, Yuurin ends up stuck being his temporary bride...?!