Hime Kishi wa Barbaroi no Yome

Serafina, the West’s fiercest knight, expected torture when captured by barbarians. Instead, she got a marriage proposal! Marrying her sworn enemy is a hard no! But after seeing her wedding captor’s culture and very pretty face, she may be tempted to swap her sword for a wedding veil. Get ready for the ultimate enemies-to-maybe-lovers arc.

(Source: Crunchyroll)