is a Japanese light novel series written by Kazuhito Minagi and illustrated by PenekoR. It began serialization on Shà Âsetsuka ni Narà  in April 2021. It was later acquired by Square Enix who began publishing it under their SQEX Novel imprint in April 2022. A manga adaptation illustrated by Kazumi Kurihara began serialization on Square Enix's Manga Up! manga service in July 2024.
Chihiro Sagami, an office worker from Japan, has woken up as a starving child in another world. Said child is actually the eighth princess who was abandoned by the king. In an attempt to save her life, Chihiro makes a deal with a chef where she gets food for the work she puts in their kitchen.
Written by Kazuhito Minagi, Your Castle's Little Helper began serialization on Shà Âsetsuka ni Narà  on April 4, 2021. It was later acquired by Square Enix who began publishing the series with illustrations by PenekoR under their SQEX Novel light novel imprint on April 7, 2022. Six volumes have been released as of March 6, 2026.
A manga adaptation illustrated by Kazumi Kurihara began serialization on Square Enix's Manga Up! manga service on July 2, 2024. The manga's chapters have been compiled into four tankà Âbon volumes as of March 2026.
The manga's chapters are published in English on Square Enix's Manga Up! Global manga service.
The manga adaptation was ranked 5th in the sixth Sanyodo Bookstore Comic Awards in 2025. The manga, alongside Toshoshitsu no Kihara, was ranked eleventh in the 2026 edition of Takarajimasha's Kono Manga ga Sugoi! guidebook's list of the best manga for female readers. The manga was ranked third in the Nationwide Bookstore Employees' Recommended Comics list of 2026. The manga, alongside KÃ Âshaku-sama, Akusai no Watashi wa MÃ Â HÃ Âtteoite Kudasai, won the Isekai Comic Prize at the 2026 Digital Comic Awards.