In the manga, Loid eventually comes to know that Yor is an assassin. This revelation often leads to interesting plot twists and character developments that shape the story further.
One great Loid x Yor fanfic is 'A Spy's Heart'. It delves into the deeper emotions of Loid as he starts to truly care for Yor beyond their fake marriage setup. It shows his internal struggle between his mission and his growing feelings.