...Are we sure this arc isn't called "Juwan, again" if this turns out to be in a similar vein as the one arc he had about his crush on Minju?
I hope Hara is just pulling off his leg or smth... she probably knows about Juwan's crush on Minju at this point (are they in middle school? Juwan still doesn't show off his brownish hair...) and how he seems to be attracted (?) to "intimidating" girls. She seems to be one to be "playful" about that if she was told about it (if they are pretty close at this point in time).
On the other hand, I dunno how to feel about Juwan's mom talking with Hara about pads and the like... it's (painfully embarrassing) enough doing so with our own mothers when we were young... Juwan's mom is still a stranger (besides, er, being her "friend's mom") to her at that point, isn't her?
Wishing this arc doesn't get as painful as the Minju one.