I'm pleasantly torn in this season. You don't have to watch S1 first, but I recommend so you can fully appreciate my crazy girl. I like the 'new blood' theme they had with the new girl but something about this doesn't scream crazy like S1 did. I give it a better rating than I did S1 because I did like the storyline with a higher level of intensity. This season is the definition of Chaotic Evil with a healthy dose of Righteousness lol
I didn't like how Yuri went about things honestly. It totally defeated the purpose of Nanno's 'teachings'. If you believe the world is screwed it works either way but eh.
Worth the watch, of course
Enjoy...