well let me start by saying i have no expectations of this series so even if it sucks im expecting it tbh, the room for any developments seems minor and from what i have heard from the manga readers if it follows the manga it will be a complete blow-fest, that's personal opinion from not reading it (they all seem to like it but i think it sounds bad).
So that being said... onto the episode...
Well it starts out pretty much nothing much, it's not good or bad, basically it's just your normal high school season 2 opening episode, we all start back at school, we are generally in the same classes (all except what's his hair...) ect, it's kind of simple and predictable. That isn't saying it's "bad", it's really just normal, we see now Deko-chan is at their school and Rikka and Yuuta will live together for some time, funny how everyone's parents all need to move out of town at the same time xD
So yeah, simple but not really bad, cross middle lined.
Though... was she smiling at the end? my logic is this:
If she was smiling - it wont be terrible "yet"
If she wasn't - the crap is about to begin