The Wallflower - manga - was created in 2010.
This site is a good one for buying any manga or anime: http://www.justmanga.com/browse.cfm?anime=Wallflower
There is currently no official announcement for a second season of "The Wallflower" anime series. The show is based on a manga series, so if the manga continues to be popular, there may be a chance for another season in the future.
The last book in the Wallflower series by Lisa Kleypas is A Wallflower Christmas.
My absolute favorite Manga of all time is: Fruits Baskets By Natsuki Tayaka. It is one of the most popular selling shojo Manga.
Wallflower - album - was created on 1993-08-10.
Wallflower - Fringe - was created on 2011-11-18.
The Perks of Being a Wallflower was created on 1999-02-01.
The Perks of Being a Wallflower - film - was created on 2012-09-21.
Sunako Nakahara, the female lead character in the manga Series "The Wallflower", birthday details are not given by Tomoko Hayakawa. Some fans believe for researching clues in the manga, it sometime in the summer.
Right now (from what I've seen and read) it is up to volume 28 and are still creating volume 29 as well.
We Were There - manga - was created in 2006.
Basilisk - manga - was created in 2005.