Other names:
King's First Love / She Became the Sickly Prince's First Love / She Became the White Moonlight of the Sick King / She Becomes The Yandere King's White Moonlight / Ta Chengle Bing Jiao Junwang De Bai Yueguang / 她成了病娇君王的白月光 / 백월광 빌런이 된 남장 여자
The female lead disguised herself as a male and became the antagonist of the story. She was forced to maintain her persona as a brutal gangster and flirt with the male lead and all sorts of evil bosses. The story shows how she manages to capture the hearts of all the young women in the harem of the male lead.