I haven't read it, but i HATE the anime!!!!
The whole "2 strangers meet and later on that night, they have buttsecks!" thing is unbelievable and plain stupid. I mean, it was all about sex and basically no plot. I expect a decent plot when watching/reading yaoi. And the uke was soo annoying. He's all sad and weepy every 3 seconds.
The artwork is horrible! (I especially hate the uke's eyes ._@;; ) The anatomy is soo off.
And last but not least... THE INVISIBLE PENISES!! X'D
Dear God, I bursted into tears once I saw that. I almost turned that s**t off!
Level C is going on my list of Worst Animes Ever, next to Gravitation. (Well, Gravitation didn't suck that much... but that's going off-topic. ><)
Basically, what I'm trying to say is;
Level C = burning_eyes