Jishou Hogosha no Kishi-sama ga Kouhou Udegumi Kareshimen de Watashi (Seijo) no o Miai o Jama Shite Kimasu!

https://www.cmoa.jp/title/327840/ Aurora, who was supposed to be an ordinary girl, suddenly awakens to mysterious powers and is declared a "Saint" by the kingdom. Her duty as a "Saint" is to marry a man approved by the kingdom. Aurora suppresses her secret longing for her adoptive father, Felix, and goes to the arranged marriage meeting, but... Felix suddenly bursts in, throwing the scene into chaos!? "I won't accept anyone as Aurora's husband unless he's superior to me in every way." There's no way any man can stand against Felix, the most handsome man in the kingdom and the highly esteemed commander of the knight order! He tries to stop the unwanted marriage and smiles gently, saying, "No matter what happens, I'll protect you," and her heart aches sweetly. What will become of the love between these two who are constantly at odds because they care so much for each other!?