Quiéra, a kind young lady to the eyes of many, has a secret and past that she could not divulge; She both works in the in the light.. and in the dark. 3 months after her perilous job, she who works as a waitress in the day suddenly got fired for an unknown reason. But there's one thing she certainly knows, the owner fired her out of his will. Now, she found a new job to apply. She wants to live her life as a plain maid serving at her new Lord's manor. But after a few days of living peacefully as a newly common maid, unexpected things began to happen. She subsequently discovered the dreadful truth behind the reason why the owner fired her in her previous job.. It was revealed that, a monstrous snake wants to gobble her body and soul up. After knowing the truth, she made a perilous decision. And that decision changed her life forever. "My Lord, please let this humble maid be... your shadow" #3 in Historical Fantasy