"Kimi wo Aisuru Ki wa Nai" to Itta Jiki Koushaku-sama ga Nazeka Dekiai shitekimasu

An arranged marriage. Two complete strangers. One adorable romance! When cheerful noblewoman Elsa is suddenly wed to the reserved duke-to-be Julius, neither expects their political marriage to spark something more. As awkward misunderstandings, sweet gestures, and growing feelings pile up, these newlyweds discover that falling in love might be the easiest—and hardest—part of married life.

(Source: Crunchyroll)