hentai logic. as long as something is blocking the perversion from their view, then they cannot hear it.
depends on the hour of the day, it may be loud outside and they may have music playing. What they wouldnot be able tohide is the smell.
Huh? Where's Nagano?I-I dunno... Bathroom, maybe?*jerk*Come on, let's get back to studying.Ah!♥Hngh...Gimme a couple more minutes...*grab**twitch**lick**lick**slurp**huff**huff*