Before they get signed and make their own work, a lot of manga creators start off making doujinshi. Doujinshi is essentially fan-created or indie manga. While some doujinshi is original, most of it is fan work based on popular properties. It's pretty much a semi-accepted practice. Some manga creators (like Taishi Zaou) still create doujinshis in addition to their professional work.
I've been debating about whether or not to post doujinshi (because of my aversion to posting fan art). Today's post is sort of a test/experiment. It's doujinshi fan art by a creator whose work has been posted here before.
The artist in question is the great Yamane Ayano, the creator of the popular Viewfinder and Crimson Spell mangas. A few years ago, she did doujinshis featuring the characters of Takehiko Inoue's sports manga Slam Dunk. In fact, she did a whole artbook of her take on the Slam Dunk characters called Fifteen. Although I wouldn't realize it until much later, the very first piece of artwork I ever encountered by Yamane Ayano was one of those Slam Dunk pictures (it's the piece of art above).
Below, you'll find a few more pieces of artwork by Yamane Ayano followed by some artwork from Takehiko Inoue's original manga for comparison.
Image Archive (.zip): RS or MF