Everything Changed After I Died

My funeral has begun.
“How can she not shed tears when her twin sister died?”
“I heard she’s an idiot, so the rumors must be true.”
“I heard she has an inferiority complex. Who knows, maybe she is happy inside.”
I died of poison. And overnight I became Mergen’s burden, Irene.
You said you wanted to live like me? No, Irene. You shouldn’t live like that.
“You’re not going anywhere without my permission, Noona.”
Since when did Abel, who treated Irene like a bug, start calling me Noona?
“Keep your promise. Our deal isn’t over yet.”
My ex-fiancé, with whom I had a strictly business relationship, started treating Irene like the old me.
“I don’t care what it is. I’m a vulgar mongrel, unlike you, so I can digest whatever I swallow.”
Why does the Grand Duke, whom I thought was the enemy, do this?
The attitudes of the three men are puzzling. It is said that there are no permanent enemies or allies, but has there ever been a time when things were so unclear as now?