Majutsushi Danchou no Keiyaku Kekkon

The super handsome commander sorcerer Ray is so popular with the ladies that he's become uncomfortable with them. One day, his grandmother pressures him into going on a blind date, and there he meets Bridget, a workaholic auditor. When Ray learns that Bridget had given up on getting married just like him, he proposes a contract marriage to put an end to their blind dates. But when they begin their married life, and get closer by the day, they find it surprisingly fun?

(Source: Square Enix)