It was serialized online between September 2016 and November 2020 on the user-generated novel publishing website Shōsetsuka ni Narō.

Ten years ago, a hero saved the kingdom from a horde of demons; however, he was badly injured.

Years later, he returns with a daughter and both are pulled into a centuries-long dark history surrounding the royal family.

Written by Matsuura, Reincarnated as the Daughter of the Legendary Hero and the Queen of Spirits was initially serialized on the user-generated novel publishing website Shōsetsuka ni Narō from September 10, 2016, to November 1, 2020.

[2] It was later acquired by Fujimi Shobo who published nine volumes with illustrations by keepout under their Kadokawa Books light novel imprint from March 10, 2018 to October 7, 2022.