"I am Corsona, the youngest female knight in the Kingdom of Austin. My sister Nora and I are twins. We were engraved with the twin curse of our family at birth."
"I'm Nora, I have a knight sister. I only have weak magic, but with my excellent theory and historical achievements, I work as the prince's tutor in the castle. But I didn't expect to be involved in a series of turmoils..."
Concept: Protagonist growth/power struggle/magic world