The Warrior Princess and the Barbaric King
A comedy series that brings humor and levity to its premise.
"Just kill me!" These are the words of Serafina de Lavillant, the strongest female knight in the West. After being defeated in a war with the East, she has become a prisoner of the barbarians! What awaits the captive Serafina is a life of revenge, torture, and humiliation... or so she thought! What she is offered instead is a marriage to the barbarian king?! An intriguing tale of otherworldly marriage is about to begin! (Source: Kodansha USA)
Plot summary from MyAnimeList. Data and images via Jikan API.