Take two polar opposites, an open, outgoing and stylish gyaru, and an easily flustered, shy, old-fashioned outsider who is into doll- and clothes-making. Even though they sound so extremely different, they click so incredibly well with each other, and I just love their interactions throughout the entire manga. The female lead goes against every stereotype of a gyaru, and does not show any restraint when it comes to showing what she likes, thus being able to completely nerd out over some things.
The manga takes some tangents when it comes to clothes and cosplay, so if you are absolutely not interested in that, it may become boring for you. Especially throughout the later development of the story, cosplaying becomes a more and more apparent main theme.
As for the romance aspect of it, it is rather slow. Their feelings become quite apparent already in the early development, however they really take their time getting closer to each other. And like I said, it seems that in the later development the cosplaying aspect takes the focus (at least partially) and pushes the romance a bit more into the background.
