In this case the term “Lolita” has nothing to do with the book, which is how I am assuming you are taking it.
The “Lolita” style (as it is called) is extremely popular in Japan and some of the more trendy and/or gothy/vintagey sub-cultures in America, it has nothing to do with any kind of sexual connotation. You can go online and google “lolita dresses” and you will find alot of different dresses. I myself have a couple. Admittedly, they do not look like the dress in that picture, but I personally think that name was chosen for the Japanese connotations that it has.
BS
A “lolita” is a little girl that likes to have sex with old men. A “lolita geisha” is a child prostitute. Sometimes “lola” is used instead of lolita.