Just listening to the song, (just starting to check out this episode), the song sucks...
And the lyrics is totally ridiculous.
It pretty much picked up right after where the last season left off....at the beginning of volume 8.
They covered 7 volumes (although vol.7 was a bit rushed, but the OVA took care of that) in 26 eps. That means season 2 will probably cover just as much..., up to vol.14, although at the rate the manga is going, I seriously doubt that it'll finish by vol.14, but at least vol.14 should be released by October, when the anime ends this season. Maybe there's gonna be a third season :O j/k