So is really IS episode 7, they didn't try to modify the story to fit it into the timeline continuing after episode 3 (Yuutsu II), but played out the story as it is: happening
after the entire Yuutsu volume.
I see what Kyoani is trying to do here now, they're basically doing the same thing Tanigawa Nagaru-san is doing with the novels: the chapters (episode) aren't presented linearly, rather, they're shuffled up and played out "randomly". The Lockdown Dimension incidents
and this
all happened during Yuutsu, (timeline wise)
before this baseball competition. But episode wise, they're still to come...
Hmm, a way to stir up interest in the first-time watchers by enshrouding them with unknowns first? Wow... nicely done Kyoani...
And something that probably only novel-readers would notice: Nagato's glasses are gone. kawaii~ ^^
Sugita-san's "ちっがーう!!" in the preview there, awesome.
And Mikuru's ero photography session... Let's just say this place is going to get messy next week. ^^;