The king might need a secretary in manga for several reasons. One could be to organize and schedule his busy schedule. Another could be to assist in communicating with various officials and subjects. Also, the secretary could help the king keep track of important matters and make sure nothing slips through the cracks.
I think 'Ouran High School Host Club' has some similarities. It has a unique art style and characters with hidden depths, similar to Midnight Secretary.
Secretary Kim manga is popular for several reasons. Firstly, the art style is visually appealing. Secondly, the storylines are unique and full of surprises. Also, the character development is deep and makes you care about the characters.
The secretary Fujiwara hentai manga's popularity is quite niche. It attracts a specific group of people who have a specific taste for this kind of content, but it's not something that would be widely popular among the general manga-consuming public.
You might like 'Vampire Knight'. It has complex vampire characters and a story that combines romance and mystery, similar to what you might expect from something like 'Vampire Secretary'.
The secretary hentai manga genre is known for its adult content, depicting various sexual fantasies involving secretaries. Such manga is usually aimed at a specific audience seeking this kind of explicit material.
Maybe the plot development is not as expected or the character designs don't appeal to some readers.
It could be that the plot development doesn't meet readers' expectations or the character portrayal is off.
It's a rather adult-oriented and potentially inappropriate genre of manga. I wouldn't recommend delving into it.
It usually features adult-oriented content with explicit and sometimes unconventional themes.
One manga that could be similar is 'Black Rose Alice'. It shares some elements of mature themes and complex character relationships like Midnight Secretary.