Celebrity/ royals/ famous

The male lead is a crazy, extremely jealous king. The female lead is setting up a plan to escape her faith-death. She reincarnated as someone from Korea to a novel world.

The ex gf is a celebrity and help the Male lead to to be a guess chief on a TV show.

I am not sure what's going on yet but I the Empress is under a manipulation of the grand duke. I'm not even sure if he really cares for the Empress but the whole stories not yet given here, so just have to wait.