Accomplishments of the Duke's Daughter

is a Japanese light novel series written by Reia and illustrated by Futaba Hazuki. It was initially self-published through the novel publishing website Shōsetsuka ni Narō. The series is composed of 265 chapters starting on February 7, 2015 and ending on September 3, 2017. The series was popular and had over 145 million page views.

Starting in November 2015, Fujimi Shobo began publishing a light novel version of the series on the light novel Imprint Kadokawa Books. The light novel series was completed in December 2018 with eight volumes. The series was popular in Japan and sold approximately 500,000 copies.

Seven Seas Entertainment has also licensed the light novels, with the first volume released in print in July 2021.

A manga adaptation of Accomplishments of the Duke's Daughter by Suki Umemiya began publication on Kadokawa Shoten's Young Ace website Young Ace UP starting on December 22, 2015. The first volume of the series was released the following year on September 10. The series is licensed in English by Seven Seas Entertainment and the first volume was released on August 7, 2018.