As if the manichean story wasn't boring enough, the story and the characters revolve entirely around the not that interesting Purity Sue hero, Yuki. 3/4 of the talking from side characters is about how Yukki feels, if he's doing well, if everything that's happening isn't too much for his fragile little mind, etc. Actualy side character is too flattering a term, all of them are fanboys/girls. The only bearable character is Zess/Luka, because he's good looking and most importantly keeps the talking to a minimum.
That said, the animation is friggin great, same for the ost. It's a wonder how such an amount of money was poured into such a crappy concept.