THE WARRIOR PRINCESS AND THE BARBARIC KING

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) — Description from AniList community (anilist.co).