Duchess of the attic
Before I start a recommendation thread, since there does not appear to be one already. I came across a manga and a few. Chapters of the light/web novel of Duchess in the attic, or Yane Urabeya no Koushaku.
The series as a novel appears to have potential from the few chapters and manga chapters that I have read, but I do not have a full impression yet. Is this a series anyone else has read?