The Duke’s Son Claims He Won’t Love Me Yet Showers Me with Adoration

"Kimi wo Aisuru Ki wa nai" to Itta Jiki Koushaku-sama ga Naze ka Dekiai Shitekimasu · 「きみを愛する気はない」と言った次期公爵様がなぜか溺愛してきます

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)