I wonder if this is an actual world building arc or if it's metafictional (e.g. one of Akigumo's doujins). The latter would be more in line with the rest of the series.
You don't need to be friends with shitty girls like that anyway, Ooi.
If it was only chuunibyou...Junior High-School Girl Ooi Part 2Really? Then that's fine, but...If it's really the case, then I guess we should stop being friends.Yeah, that'd be pretty embarrassin', wouldn't it?Then that would be fine, yeah...Don't tell me you're still seeing things?Ahaha...Or is it a recurrence of that (chuunibyou)?Eh!?T-that's not it!?Y-Yeah, right?Is it that thing they used to talk about long ago - the Esper Girl Rebirth?