Things That Could Not Be Overcome

"I hereby dissolve my engagement with you, Lady Mary Dover!" On a certain day when she was ten years old, Mary realized that she had been reborn into a world with the same settings as a game. She made efforts to be united with Prince Edward, her favorite from her previous life, surpassed the original story, and even reached the point of being engaged to him. However, what awaited Mary at the academy's graduation party was an announcement of engagement dissolution that did not exist in the original story. What exactly had Mary overlooked...