I have never seen an anime that has gotten me so intrigued so fast! In just the first few minutes of watching this I would have to watch every episode and would love the series forever more.
I stumbled upon this series while looking for a new action series to watch, it was suggested in a top 10 YouTube video that made it look like a complete action anime with nothing else (it didn't even bother to mention romance). Although it wasn't what is was expecting i was glad that it is what it is and i probably wouldn't be giving it such a high rating now if it had actually been like i though it would have.
This anime has one of the best plots i have ever seen in an anime (and yes, i have watched other anime's like it) with such amazing characters!