is a Japanese manga series written by Saiko Wadori and illustrated by Mika Kajiyama. It began serialization in Akita Shoten's shà Âjo manga magazine Princess in February 2019.
The series focuses on Sakura, a high school girl who is obsessed with cleanliness. She becomes so obsessed with cleanliness that it's become a hobby for her. One day she gets kidnapped and transported to another world, and lands in an area ruled by a Demon King. Once she finds herself in that area, she is stunned by how unclean it all is. The area is under a curse from a witch that prevents the use of cleaning magic, as a result of that the demons have given up trying to clean the area. Sakura decides to take matters in her own hands and clean up the whole area.
Written by Saiko Wadori and illustrated by Mika Kajiyama, His Majesty the Demon King's Housekeeper began serialization in Akita Shoten's shà Âjo manga magazine Princess on February 6, 2019. Its chapters were collected into twelve tankà Âbon volumes as of May 2025. The series is licensed in English by Seven Seas Entertainment.
In a review for Da Vinci Web, Shun Itono and Negoto described the highlight of the series being the main character's cleaning skills, calling it "refreshing" how other characters approve of her skills. They also recommended the series for fans of isekai and for people who want to feel positive while cleaning.