Trying to find a certain fanfic. (Ainz/Schalltear MC)

Main characters are Schalltear and Ainz. After protecting the village, Ainz agrees to king of Re-estize offer to become the head of the kingdoms mage guild. Schalltear pretends to be his underage, defensless lover, to appear vulnerable and attract people trying to extract information from her. Ainz is out of character, and what i mean by that, he is actually smart calculative person, dont just appear to be.

I remember this being pretty weird, but also well written and entertaining story. Does anyone recognize fanfic i am describing? I cant find it no matter how hard i am trying.