I'm a bit dizzy, (I've got a headache) so forgive me if my post doesn't make sense.
Frankly, I don't know. I didn't read the manga. -,-"
Yes, it doesn't end. And I know that feelings very well. Watched all 103 episodes only to find out that they ended it with a cliffhanger. A hanging ending or whatever else they're supposed to be called. Blah! But still, the fact is that nothing was being resolved! I feel like I was being cheated!! Urgghh! Stupid of them!! I wish they had continue it and follow the manga storyline, but alas, no. The ended it while the manga is still fucking on-going.
Yes, it was the final episode, for the anime at least. I almost burn my D-Gray man DVD collections out of rage. Bought it part by part after all. Shit got to the last part and the ending turns out to be fucking crap.
Less than a few actually. The anime start at Vol 1, Chap 1 of the manga and ends at Vol 16, Chap 157. The manga is still on-going and is currently at Vol 24.
Info for the manga status can be read in here.