Your Majesty, Please Listen to Me

I was reincarnated as Extra No. 1 in a novel I absolutely despised in my previous life, .Before the female lead appears, I become engaged to the male lead, Emperor Calisers.
However, he never marries me and openly cheats on me, driving me to a tragic end where I take my own life.That unfortunate extra is Isanna.But now, I’ve learned the reason he treated me so cruelly—
it was because he loved me.Having always pushed him away, I decide that in order to survive, I’ll give him exactly what he wants.My goal is simple:
stay by his side until the female lead appears—then get divorced.“Your Majesty, why do you always start the first dance with another young lady?”
“…That’s unusual. Why would you care about something like that?”
“Well… because I am your fiancée, after all.”
“…What?”
“I’m tired of waiting. I love you, Your Majesty.”
“…Say that again.”Seeing the way Calisers’ eyes waver, I know this is a good start.Everything was going according to plan—
until one day, I suddenly lose consciousness.“I will give you the palace. So enter it. Isanna.”After hearing that I had collapsed due to being afflicted by dark magic,
Calisers makes a shocking proposal—urging me to enter the imperial palace immediately…