The Reason I was a Villainess

I am Marianna of the Duke of La-Tour . I was reincarnated as a Villainess.

It seems that I was reincarnated into the world of an Otome Game that I played in my previous life, but even if I use my knowledge, my death flags may or may not be broken…….

So I’m going to live my life seriously and sincerely as a Young Noble Lady.