The Villainess Whom I Had Served for 13 Years Has Fallen

A man is transported into a novel and awakens in the body of a slum boy. He encounters a noble girl, subsequently becoming her butler for thirteen years. The narrative centers on this relationship, particularly after the noble girl has fallen from her esteemed position and now resides in an abandoned mansion with paralyzed legs. The story explores the reasons behind her downfall, revealing her role as the villainess within the novel's world. The novel features a beautiful female lead, a cunning and overpowered male protagonist who is strong from the start and progresses to become even stronger, and themes of being transported to another world. Additional tags include handsome male lead, playful protagonist, system administrator, and yandere. Reader feedback indicates strong affection for the novel, though some criticisms point to the protagonist's perceived lack of personality and passive nature, as well as concerns about the story's emotional delivery and potential for harem elements despite the title and summary. Translation quality is also a point of discussion among readers.