I Became the Wife of the Male Lead

Read manhwa I Became the Wife of the Male Lead / Author of My Own Destiny / ラスボスの私が主人公の妻になりました / 成为我男主的妻子 / 成为我笔下男主之妻 / 내 남자 주인공의 아내가 되었다
I possessed the body of “Fiona,” the final villainess whose soul was sentenced to eternal suffering after her gruesome demise at the hands of the world’s hero.
She was tortured by her own family just because she was an illegitimate child.
And so… arriving six years before the start of the novel, I was sent to war at the age of thirteen! Fortunately, as the story’s greatest villainess, Fiona was a genius mage.
I had to survive the monster invasion. But now, I couldn’t be in the middle of a battlefield.
Just before I ran out of breath, I encountered the teenaged male lead.
…Why is he here?
Well, if the male lead dies here, then the world will be destroyed. So, let’s save him first!