Kaze no Stigma, Rakudai Kishi no Cavalry Recommendations
Both girls are a princess and a chiefs daughter. The guys are both older with no talent that are super badass when they get older their family ignores them and their dads totally disowns them when their little kids. Plus the two girls both have super cool fire swords and their families think their super talented but the guys still better then the girls somehow.
The romance in both of these shows feels very similar: there is no harem hijinks - the main male and female lead are obviously attracted to each other and become the official couple early in the show.
the MC is abandoned by his father, but his sister loves him unlike his parents who ignored him for his lack of magical ability.