Gyeongseong Sanaejisa
경성사내지사
DoEun, a leader in the loyalist party known for dating many people, is given a new task: to infiltrate the household of Seo MoonTaek, a national adversary. To accomplish this, DoEun turns to JangHan, MoonTaek's son. However, complications arise when the mission involves forming a romantic bond, regardless of gender. The direction of DoEun's hundredth relationship becomes uncertain as the situation unfolds.