Yugyokje

The “Festival of Carnal Desire”—a single night when people pair off haphazardly and unabashedly give free rein to their carnal urges. Ha Yeon-Ri, the daughter of a fallen noble who lives as a palace maid, grows weary of her bleak existence and ventures out to the festival in hopes of finding even a one-night lover. There, she ends up sleeping with a wandering warrior who saved her. Contrary to her expectation that it would be just one night, upon returning to her duties as a palace maid, Ha Yeon-Ri is reunited with the warrior with whom she spent that passionate night, none other than Crown Prince Ki U-Won....

(Source: Naver Series, translated)