The reversal made this worth the read....
Ummm, is it me or are we seeing alot of "A-chans and B-chans"? Is it the same author? A manga trend? Or the scantalators doing it?
Anybody know?
It's been mentioned in this discussion and discussions of the other chapters several times, it's a choice the author made for this volume to have the characters in every story be "A-ko", "B-ko", etc.
These names are common placeholders for real names, along the lines of "Jane Doe" in the west.