Yava**na Here, it is meant to be read as "Yamanko" (Ya-vagina) instead of "Yamabiko" (An echo or lit. Mountain Boy)

Uh...p...pu...p...pu...s...s

Hmm? Didn't quite hear all of that.

I see, she's a Yamabiko. This is the time to try out what I did during the school field trip.

I see, she's a Yamabiko. This is the time to try out what I did during the school field trip.