Accomplishments of the Duke's Daughter manga volume 6 features story by Reia and art by Suki Umemiya.

Under Iris's leadership, the Armelia domain has flourished. But her success has made her a target, and now the kingdom's official religion has declared her a sinner! If Iris can't get the ex-communication order against her reversed, everything she's accomplished will fall apart. In order to clear her name, Irus has to take on not only the church but the people in power behind the scenes.