Sazukari Mashitaga, Ai Naki Kekkon wa Itashimasen

Grace Shellgrave, daughter of a marquis, seeks genuine affection rather than social alliances in a society where noble families prioritize status. Remembering her difficult past life, she attends a masquerade ball in secret and spends the night with Alan, a man who appears to share her ideals. She soon discovers she is pregnant, only to learn that Alan is the heir to House Ward, the Shellgraves' longtime enemies. Alan becomes persistent in his pursuit, but Grace resists allowing her child to be used in a typical noble arrangement. She questions whether his interest is for an heir or something more sincere. The two, from opposing families, find themselves drawn together in an aristocratic romance.