These Japanese bra ads are just so darned cryptic

Lift door opens. Man's jaw drops open when he espies sweet young lady's unusually crowded balcony. Man drops something. Comedy ensues. Much Japanese (I assume) chit-chat. The words "up up" appear frequently. Whether this refers to fabric engineering or priapic activity is unclear. Maybe they are having a discussion about the efficiency of modern elevator technology. See if you can decipher this enigma here.

Tags: TV ads, Naughty bits