My Fiancée Is the Villain? Guess I’ll Have to Cling to the Princess Instead

Mann transmigrates into the body of an early-stage cannon fodder character in a certain popular Western fantasy novel.

The good news: he’s the son of a noble.
The bad news: he’s an illegitimate child—and is about to be married off as a political tool to the second daughter of another noble family.

If that were all, it might still be manageable.
But the real problem is… his so-called fiancée just happens to be the biggest villain in the entire story.

And as for himself?
He’s destined to play his role as a minor character—only to be schemed against and killed by her during the engagement…