The choice was obvious, actually: Climbing into her sweet, sweet buttcrack. Lelou (slowly of course) crawled from the buttcheek he was on to Kallen's awaiting crack. Once there, she noticed something inching on her rump, which made her clench her cheeks, "crushing" him inbetween them. "Damn, her ass IS soft! This doesn't hurts at all! It actually feels good..." Lelouch mumbled to himself, impressed by the young girl's rear end.
Meanwhile, Kallen's stomach glurged a little. It seems whatever she had eaten for dinner wasn't exactly fresh... "Hmp!" Kallen said in her sleep, noticing something going down in her body even though she was asleep. Lelouch, however, was so excited inbetween her cheeks he didn't notice anything. Until the cheeks opened and...
PRRRRRRRFFFT!
Kallen's loud fart reverbrated across the room, lasting for several seconds. Needless to say, the smell was in level with the sound, as Lelou noticed first-hand (Or first-nose, rather) "What *cough* just happened?" He tried to crawl out of her butt just in case, but a second fart -BRRRRAP!- left him immobile. "Great... *hack* I forgot butts fart... *wheeze* What a stupid mistake..."
And just to make the situation worse, Kallen woke up to...