Honestly this is a VERY VERY VERY VERY VERY confusing storyline and it shows from the previous seasons, it's very difficult to understand unless you've read the LN or something. Anyways the story comes by as really difficult to understand in the beginning and still confuses me to this day, the art is still good, the sound is pretty decent but it's been overused for so many occasions, characters have been the exact same since season 2 besides some new additions. I didn't really enjoy this and just skipped through portions of the episodes. I still have no clue how they are releasing a season5 to this but I guess it's popular I don't know, not a lot of people like it because there's like an episode every 3 months to complete this so I wonder how long season 5 will be. Anyways overall it wasn't really enjoyable, only thing I enjoyed was the action scenes but even those are overused, everything has been basically recycled over and over again to create a promising show, which this doesn't whatsoever. If your a big fan of this series, go ahead and watch it, but if you are just joining in on the show might as well go read the LN and come back to see if you understand it, which you probably still won't.