One of the first and few references in a young and teenage focused animation to cover periods and menstrual cramps without hiding it behind tiny suggestions. It is clear throughout and the only ones to not realise until near the end are the boys after finding their tampons. Thankfully they fully realise what is up and stop being ignorant after that. The way it is addressed in this episode is almost certainly very different from animations that came in the past before this time and is actually done very well, further showing how different for the time this story was.