Anata no Oshiro no Kobito-san: Gohan Kudasai, Hatarakimasu

In a forgotten corner of a massive castle, a starving child teeters on the edge of and death…until she suddenly awakens with the memories of Chihiro Sagami, an office worker from modern Japan?! Determined to survive at all costs, she stumbles upon a kindhearted chef and strikes a deal: food in exchange for work. Though small in stature, her nimble hands and capable skills quickly earn her the fond nickname “Little Helper” among the castle staff. But behind her infectious eagerness and penchant for delicious food, her mysterious golden eyes hold a great secret that could determine the fate of the world!

Source: Manga UP! Global