Worst Manga?

I’m sure everyone here has seen plently of bad anime, but I know that I, for one, haven’t read much manga that I thought was bad. And so I ask of you, what is the worst manga that you’ve ever read?

For me, it would be Baby Birth. I liked the cover art, and even though it sounded it would be silly and girly, I thought it might be a fun read. But….ick! I didn’t like any of the characters, the back story was god awful, and the medium used to tell it in got irritating really quickly. I managed to finish the first volume, but that was about as much as I could stomach/

Ahh… "manga you like least" would be easier to answer than "worst manga".

Ah, I’ll say: Angel/Dust by Aoi Nanase.
The story is boring, the characters are just as boring, there’s no original idea to be found anywhere. The artist can draw decently, I assume, but she totally refuses to use anything else than photos as background. And drawn characters on photos just don’t look convincing. All in all the manga left me with the impression of "blah" and that it could have been better with more thought put in plot and characters, and so forth. Yeah well.