Ookami Ouji to Usotsuki na Kekkon

A romantic story that begins with a political marriage! In order to save her motherland on the verge of collapse from fiscal crisis, Eileen, a princess of the Kingdom of Ayuth, is married off to Prince Ruslan of the Eren Empire. Ruslan is gentle and treats Eileen who has gone through hardship in Ayuth with kindness... But it seems he's not just a gentle soul. It turns out Ruslan can be a little mean, and he is the leader of a special force called "The Wolves"...?!

(Source: MangaPlaza)