You Can Keep The Male Lead

A brief description of the light novel You Can Keep The Male Lead:
I was just sleeping, but when I opened my eyes, I’ve become someone else in a white bridal dress.
Erin Spillet.
I became the villainess of a novel.
My bridegroom, the male lead, kept making eye contact with another woman. It was the heroine; his love interest.
What do they think they’re doing when he’s about to get wedded to someone else?
‘What’s so good about this man?’
But then, someone asked me, who was only a supporting character and an uninvited guest in this novel that no one cared about.
“Will you stay here or go outside?”
I, who was dazed and barefooted, was given a new pair of shoes by the prince. He was being kind to me.
“I don’t think I need to stay any longer now that the ceremony is over.”
“That’s a wise judgment.”
He gracefully reached out his hand and I took it.
Heroine, you can keep the male lead.