Heres my theory.... I believe that luca has traveled back in time and is reliveing the same life he has in the past , but what if this isnt the first time hes traveled back in time because he seemed as if he was use to it ,like it was a regular occurence . I also believe the duchess is treating the FL differently because she reminds her of the princess she use to serve especially the eyes... and Ruediger treats her differntly might be because he was touched of the fact she took care of luca for so long by herself with no family , but Im not deffenite on the reason for Ruediger . And thats it (ALSO RUEDI IS SO HOT