Accomplishments of the Duke's Daughter Novel Volume 3 features story by Reia and art by Haduki Futaba.

Iris overcame the threat of excommunication, but now she faces something far worse. The bells of war are tolling, and an enemy nation stands poised to strike. Why, then, is there talk of dismantling the kingdom’s armed forces? As Iris desperately shores up her duchy’s own defenses, she must answer a question from one of her closest companions, Dida: “If it comes to war, are you prepared to order us to kill?”