Wakeari Madoushi wa Shizuka ni Kurashitai

In a world where only men can use magic, Eco can use magic despite being a woman. Even though she was living while trying to hide her power, her magic might be exposed. Then, her cousin suggests "work at the Magic Bureau in my stead." Eco decides to dress as a man and work as a mage. However, when she arrives, there are strange colleagues and incidents. Her life is full of trouble!? A fantasy story about a magician with special circumstances and a job full of troubles, adapted into a comic!

(Source: AlphaPolis, translated)