The Greedy Side Character and the Cannon Fodder Male Lead Got Together

Jiang Xue is reborn, and her memories awaken. She discovers that she is the supporting female character in a novel. Jiang Xue refuses to believe it. Even if she isn't the heroine, surely she can't be the supporting female character. She'd be fine as some random passerby! How is she supposed to make money if she has to follow the plot?

Mu Ze transmigrates to ancient times and becomes a prince. He enjoys it for only a few days before realizing he's cannon fodder, there to motivate his lazy older brother to fight for the throne. And that older brother is the real male lead.