I don't know if this question gets answered further into the story but if Molly and Tsuneyo have been in Sensei's class before, why don't they have memories of it? The other girls remember things from before the resets. So do other characters outside his class. Is there a reason for this? Not looking for spoilers just wondering if it gets explained.
Searching for these answers in the thread is leading me to spoilers I'm trying to avoid.
Searching for these answers in the thread is leading me to spoilers I'm trying to avoid.