Kasei Madoushi no Isekai Seikatsu

A-rank adventurer Alec meets Shiori, a woman with the mysterious title of "household mage." Shiori, the low-rank magician, is able to prepare warm baths and delicious meals on their adventures with her strange use of magic, providing an all-too comfortable environment that would be unfitting to call an ordinary camp. Though she has thoroughly won over the hearts of Alec and his companions, she has a secret. ___ Alec, an A-rank adventurer, meets Shiori, a woman with the mysterious appellation "housekeeping mage." She has so little magical power that she’s useless as a combat mage, but to make up for it, she uses her magic to take care of all the daily chores of an expedition, like washing and cooking, single-handedly. As Alec adventures with Shiori, her novel use of magic provides a warm bath and delicious food... in other words, an environment much too comfortable to be called "camping"! He's completely taken with her, but she has a certain secret... ___ Original Web Novel