This would be a little introduction to Paradise Kiss, which is the sequel of Gokinjo Monogatari.
The main characters of this manga are Yukari, Miwako, Arashi, Hiroyuki....
Some of the characters are well-known from Gokinjo, but many other, like Yukari or George, are new.
Anyway, the story is not concentrated on the old character, but rather on the newer.

The manga itself has an age target higher than Gokinjo's one: if Gokinjo was written for girls in their 15-16, Paradise Kiss is more for 18-20 years old girls.
The story is more mature, and the design too is maturated.
Yazawa's sensei drawings are clearer than her previous works, and this contributes to the general effect the manga has on you when you first read it.

Paradise Kiss is published in Japan, Thailand, Taiwan, Hong Kong and Italy.

[H's note: this time again, every information is based on the italian version of the manga, which started on November 2001 - the best birthday present I could receive - and it's published bimonthly.]