Ikenie to shite Suterareta node, Henkyou Hakke ni Jibun o Urimasu: Itsunomanika Seijo to Yobare, Dekiai Sareteimashita

Abused by her family, Luana was sent to the monster-infested frontier in their place. She refused to die in vain! She promoted herself as a hidden user of light magic, eventually gaining recognition as a saint. "I'll definitely protect you," said Sieghart, the son of the Margrave, with his tsundere kindness, reminding her of the warmth of human beings... And then, she reunites with her former family!? The Margrave is the only "family" I have! A story of overthrowing the ruling elite, where an abandoned young lady finds true happiness! (Source: KADOKAWA, translated) *Note: Includes five extra chapters.*