The Main Plot: The central story follows the main character (MC) and the male lead (ML) falling in love. It is a straight romance.The ML's Brother: The specific subplot I'm looking for centers on the Male Lead's brother. This brother enters into a strict political contract relationship with a powerful, dominant noble girl. She controls a massive private army and uses her military backing to help him stage a coup so that he successfully becomes the King (and is actively the King now). The brother is physically sick/chronically ill, which makes him weak and vulnerable.
The Main Plot: The central story follows the main character (MC) and the male lead (ML) falling in love. It is a straight romance.The ML's Brother: The specific subplot I'm looking for centers on the Male Lead's brother. This brother enters into a strict political contract relationship with a powerful, dominant noble girl. She controls a massive private army and uses her military backing to help him stage a coup so that he successfully becomes the King (and is actively the King now). The brother is physically sick/chronically ill, which makes him weak and vulnerable.