Gisou Kekkon no Hazu ga Aisareteimasu - Tensai Fuyojutsushi wa Ringoku de Kyuukachuu

"Phyllis — I want you to be my wife." Phyllis has worked as a royal court enchanter for three years, devoting nearly every waking moment to her demanding job. Even holidays are just another workday. But one day, her trusted fiancé suddenly breaks off their engagement—claiming he's found his "true soulmate." Heartbroken and at a loss, Phyllis encounters a visiting prince from a neighboring kingdom who unexpectedly offers her a contract marriage. Thus begins a romance born from convenience, where mutual benefits spark something much deeper.