K-Drama 
FL is forced to marry 2ML prince/emperor instead of the ML boyfriend/prince, later needs ML to protect the capital from a 3rd prince, FL offers to reward him physically, palace intrigue makes everything complicated.
ML is a black flag who is obsessed with love over everything else, 2ML is red flag who is obsessed with the crown, FL is constantly being manipulated by others, making sacrifices, and crying.
Ta Cong Ye Se Shen Chu Lai feels like someone made a fanfic version of A Tale of Love and Loyalty because they wanted the novel HE instead of the drama BE.
ML is a black flag who is obsessed with love over everything else, 2ML is red flag who is obsessed with the crown, FL is constantly being manipulated by others, making sacrifices, and crying.
Ta Cong Ye Se Shen Chu Lai feels like someone made a fanfic version of A Tale of Love and Loyalty because they wanted the novel HE instead of the drama BE.
