To get the main thing out of the way first this season of Infinite Stratos is a harem, echhi, comedy with SOME story in it. NOT an aspiring story with some harem, ecchi, and comedy in it (yes there's a difference).
The anime follows Ichika with all the main characters from the first series placed into this one. A lot of it becomes the awkward harem ecchi that is to be expected from Infinite Stratos with little deviation from the original seasons. The character development wasn't too bad considering most of it was done in the first season although it feels like the ecchi and harem parts have been taken up a few notches.
The problem comes into play mostly as they hint of an arc or story that rarely comes to light in each episode. In the end if your hoping to watch an enthralling story the anime will quickly feel like 10 episodes of fillers and 2 episodes of story.
Overall its fairly hard to critique the second season as it doesn't do too much from the first. They both had fairly average story, the art is similar along with the sound and the characters are the the same as well with few editions. With the haphazard use of the story it becomes difficult to review an anime that doesn't add too much to the series. A few things are found out particularly about the antagonists and how they relate to Ichika but it doesn't seem to delve much deeper then that. The last episode is where the story really comes into play and sort of wraps up, but it feels quite obvious that this seasons was made to push the story along a bit and set up for another sequel.
Still though taking the anime like it is, its one of my favorites. The females flock to Ichika as expected in a harem. There is ecchi scenes and times when they are being really cute or really strong. Ichika is still as weak as ever but its good to see him fighting for his friends and I particularly enjoyed the strength that Charlotte and Laura bring into play.
In closing (or TLDRthrough its an interesting anime, in which I feel if you enjoyed the first series you may likely enjoy this one. Although don't expect too much from the story as a lot of it will feel like a group of people doing random stuff for a while until the last episode.
