Prologue
Suddenly, I had regained the memories of my previous life.
I was just your normal student majoring in magecraft, but because science and magic were far more developed in that world than they were here, that knowledge of mine had become extremely valuable.
When I realized that fact, I could feel emotions of surprise and excitement well up inside of me.
But what astonished me the most about this world was that it was very similar to a popular game from my previous life.
The maiden game that my sister loved, ‘Espressivo of Light and Darkness’ was about how the heroine– the daughter of a Viscount house, wins the hearts of a prince and various other gentlemen.
My older sister was a closet nerd and had nobody to share her thoughts with, so she pushed me to play the game instead since I was already aware of her hobbies.
I played it under such circumstances, but putting myself in the position of the popular, bright, and cheerful heroine was surprisingly fun for me.
But you see, there was a character who always got in the heroine’s way– the villainous daughter, Sophia. She was the daughter of the Rosenberg Marquis house, a genuine noble, and also the prince’s fiancée.
She had loved the prince ever since their first meeting, but he ended up falling in love with another girl– the heroine of the game, which in turn drove her into insanity.