Possibly the most upsetting thing about this is that it's probably canon that Academy City is granting lots of people psionic roofie powers. Misaki could totally do this, for instance.
(Of course, the effect could have been dispelled by having Touma touch Kuroko, but then Konori-senpai doesn't know that.)
Interesting character work, though. Some of Konori's thoughts seem to imply she's been frustrated by Kuroko's pursuit of Misaka, though it's a little ambiguous how to take that. And yeah, the ending is a weird little meditation on the interplay of experience and memory.