Festival is Chapter 1 of the Twelve Nights manhwa.
The people of Ga Guk celebrates the day of the first full moon during the eleventh year of rule of Emperor Jin Won. Meanwhile, Yoo Dan Ah, who is disguised as a man, gets caught in a fight with Nam Yang Heon. She asks for Yi Won's help, who is seen spending his time gambling, but ignores her. Fortunately, Dan Ah is saved by Nabi. Yi Won beats up Yang Heon while Dan Ah and Nabi escape the commotion.