Substitute Bride: Banished With Her Fierce Duke

A modern spatial-ability user awakens as Elira, an illegitimate daughter forced to marry Duke Roderic in her half-sister's place as his family faces exile. She empties the vault, gathers supplies, and leads them north. Amid Valen and Aurelian conspiracies, she uncovers evidence, overturns the treason charges, and clears Roderic's name. From discarded pawn to master strategist, she saves a doomed family—and finds a partner who will never let go. The exile ends, but a new battle begins.