It seems like we are going back to the initial school setting, which I welcome.
Did Meiko get bullied in the past, or something? Is the black-haired girl – I'm inclined to say the black-haired girl, singular – in her memory someone who also changed from being authentic to fake, compelling Meiko to become a judgmental person too?
I assume the shichinin misaki are going to continue to swap places with people, like a queue? The previous misaki #1 is probably gone, so now Meiko is #7.