Shoudoubutsu-kei Reijou wa Koori no Ouji ni Dekiai Sareru

The first prince of the Kingdom of Zavanni, William Zavanni, could not imagine being protected by someone weaker than himself. So, on his own merits, he rose to the position of vice-captain of the royal guard and began to train with them, unaware that rumors surrounded him. The king and queen are worried about him and gather all the young ladies of the Zavanni Kingdom who are above a count's rank. The count's daughter, who, without making eye contact, was suddenly made the fiancée of the first prince.

...That doesn't make any sense.