I agree with most of the reviews here. The anime started out great. The story line was great. They had a bunch of great characters and development of them was nicely done. Then, half way through it, they picked up and rush too much information in way too fast. I seriously don't know how to explain it in words. It's like they literally didn't want to do leave the fans hanging so they finish it, but only put in all the main plots of the story in, but you would had to read the books before hand to know what's really going on because it's was on fast forward times 8!
I mainly want to say, this anime should had been two seasons, but I guess they saw there wasn't going to be another season after, and so, they had to pick and choose what to tell us to finish it. Again, this wasn't a good or bad idea. It's good for people that already know the story and bad for people that don't know it at all.
Honestly at the very end, I didn't know what was going on? It seemed like they were talking about a lot information that came up to that very point, but the thing is...they never told us anything!!! They, just skipped to the end. I'm not kidding either. It was Climax scene to climax scene to climax scene. I was left feeling ???????????? It just went from what seemed like the middle of the series to the end in one and half episodes. There were a 2 or 3 more characters that came out at the end and it seemed like they were important characters that needed to be explained. I mean, they looked super important to the whole series, but I was left feeling, okay, this guy knows everything and he talking a whole of lot information, and now I see the final battle. Who are you? Were you the main villain? Were you just the secret villain? Were you the guy that just came out of nowhere? Why are you here? Why are you fighting that dude? Ahh...I want to know! It looks cool, but I just don't know what's happening. So sad.
Also, it is confusing to know who was the good guy or bad guy in story. I kept watching it and didn't know what was going on and didn't feel anything towards the end, but confused and rip offed. It was never told who was the "REAL Villain" and it will never will be now. One of the main story lines was the Demon King and he like an anti-hero, but maybe, he was the villain really at the end? I don't know. I can't come to a conclusion on a show 8 times fast-forward. lol
The ending doesn't make any sense. Since, we don't know anything. How could it? It's like one minute, you're in the middle of the season and the next show your in the middle half, then the next show your at the ending. So many things weren't explained and I had no clue to what to get out of it. I could see how they got the happy ending, probably, but I don't really know if that's was supposed to be a happy ending or not. I'm just pissed!
This series could had easily been 5 stars. No problem. It just never had the chance to developed into it. Good for people that already know the story, otherwise, stay far-far away from this one. You'll be just pissed at the end.