The opening was really nice,you could hear the word 'epic' in it =] The ending was good too but I prefer music with more beat.
Well Aria's voice was pretty much as i expected it to be,but I still liked it since it suites her.
The male lead Tohyama Kinji at first you would expect it to be the usual plain 'I just want to live a normal life' guy who gets drawn in in something crazy.Although he Is like that most of the time, he has a unique ability called Hysteria mode which if you didn't read the manga would surprise you.
I liked that Kinji sexually harassed Aria a few times :P You could already guess that they would be in the same class and would sit close to each other but this time it wasn't by chance or teacher's orders.Aria declared that she would sit next to him herself that in my opinion was a nice change from the usual.Also when she gave him back his belt you could already predict that the class would go nuts.I expected a bit more of a reaction from the class that was the thing that disappointed me a bit.
Also about Shirayuki,she obviously likes Kin-ch..erm i mean Kinji.And since she has a better female body than Aria you can see that there will be times where they will fight over something(probably Kinji) and It'll open room for some comedy.