I Became The Older Sister of A Regretful Male Lead

Trapped in a novel as the doomed sister of a regretful trash male lead, Edna faces a ticking clock: a dark disease that will claim her life in three years. Her only hope for survival? Constant physical contact with a divine power—held only by the 3rd Prince. To save herself, she must secure a contract engagement with the royal, but a hilarious misunderstanding turns her desperate plea into a strange obsession with his sister. Will Edna survive the game of nobility and love, or will her time run out? Dive into the story now—read Chapter 1!