Aesillok

Seo-An met His Majesty by chance on his way to the state exam. Having passed the exam, he is now a civil servant dressed like a concubine!? Seo-An's turbulent palace life begins!
A variety of pairings await you, such as king X civil servant, crown prince X military officer, and more! ♡
(Source: Wisdom House)
Note: Includes 6 extra chapters