Timeless (Guess)

In Orogi, time is currency. Earn enough, and you can live forever; fall short, and you will meet an untimely death. Rae's time is running out. When she is selected as the first female to participate in the Timeless Trials, the brutal games meant to entertain the rich, Rae knows it's a death sentence. Only one can survive the games. But if she can survive a little longer... If she can set aside her dangerous attraction to the prince's brother... She could win the grand prize of immortality. Stuck in a deadly competition, caught between two brothers in a game of royal politics, and tempted by love, Rae must find a way to buy a little more time before her time runs out.