The Magic Princess Returns to Death and Defeats the Demon Lord Before the Hero

Anastasia, the magical princess who had lost the hero who was supposed to be her lover to her sister and was left in shambles, died in despair.
She was, however, transported back to the first year of the Magic Academy before meeting the hero. Furthermore, the curse that once afflicted her has vanished, leaving only her vast magical abilities.
―I don’t want to see the hero again.
She decides to beat the Demon Lord before the heroes arrive by using the cheat magic she got from her last life.
Then he encounters the person who will die sooner or later, “It’s already troublesome, so I’m going to use my power to overwhelm both fate and the demon king.”
This is the story of a magical princess who attacks her enemies with magical fists and a senpai at the top of the academy who falls in love with her.