On a normal day in Dr. Light’s laboratory, the robot siblings: Rock and Roll, were cleaning the lab together.
The doctor had recently left the country for work, and would be gone for a week or two. Until he returned, it was up to the two of them to take care of the lab.
 
“Come on, Rock! Aren’t you finished with your side yet?” yelled Roll.
 
The two of them had decided to each clean a side of each room of the place, in order to get through it faster.
 
“I’m going as fast as I can! Besides, you know I can’t work as well on an empty stomach…” answered Rock.
 
Due to having to spend much of his time saving the world as the fighting robot Megaman, Rock was a bit rusty when it came to cleaning.
 
“Well, you’d better hurry up then! If you’re not done in 1 minute, no breakfast for you!”
 
“What?! I can’t finish this in just a minute! Give me at least 3!”
 
“Clock’s ticking, Rock! If you don’t want to stay hungry until late, you’d best get to cleaning!”
 
Rock began to clean as fast as he could, but in his hastiness, he ended up dropping his bucket on the floor, spilling water all over the place. He rushed to clean it up as fast as he could, but it was too late.
 
“5… 4… 3… 2… 1… 0! That’s it Rock, no breakfast for you today!”
 
“Come on, Roll, don’t do this! I don’t wanna wait until lunchtime to eat anything!”
 
“Nuh uh! If you had just done you job properly, this wouldn’t be happening. You’ve got no one to blame but yourself.” Roll pushed Rock out of the room.
“Now go back to your room, I still have to clean up the mess you’ve made! Next time I’ll just do this on my own.”
 
Rock was very frustrated with Roll. He’d be fine if she had just kicked him out, but not letting him eat was unforgivable.
She needed to be taught a lesson, and Rock knew exactly how…
 
 
Later on, Roll was calmly sweeping the living room, humming a little tune.
Rock quietly sneaked behind her… and stuffed her head inside his mouth!
 
*GULP*
 
“Eeeek!!” Roll’s terrified scream was muffled inside of her brother’s maw.
 
Rock picked up Roll by the shoulder and lifted her up, and once she was high enough, he let go, and Roll quickly descended down his gullet.
 
*SLUURRP*
*GULP*
 
Rock licked his lips and gave his engorged gut a few pets. A loud *GURGLE* came from it, and Rock release a loud eructation as a result:
 
“BRRUUAARRPP!!! ’Scuse me. Hehe~”
 
“Rock, what the heck?! Why did you eat me?!” asked Roll, who was struggling nonstop inside Rock’s stomach.
 
“HWAARRPP~ Well, you didn’t want to let me eat breakfast, so I just made you my breakfast!”
 
“You big dummy! I wasn’t being serious! I was gonna surprise you in your bedroom with a bunch of food!”
 
“Oh… You were? Er… Oops. Sorry about this.” said Rock, embarassed.
 
“*Sigh*, it’s ok. Now just get me out of here, it’s really gross.”
 
“No worries! Just a question… How exactly do I let you out?”
 
Roll’s eyes widened at Rock’s answer.
“ARE YOU SAYING THAT YOU ATE ME WITHOUT EVEN KNOWING HOW TO LET ME OUT?!”
 
“Yeah… I thought you’d know, but I guess you don’t…”
 
Rock’s face then shifted into a smug expression.
 
“Well… to be honest, I’m kinda enjoying having you in there.” he said, laying down on his belly. “I think I might just keep you inside my gut after all~”
 
“What?! Don’t be stupid, Rock! I’m gonna get digested in here!”
 
“Oh, don’t be such a scaredy cat! The doctor can just rebuild you once he’s back, so it’ll be fine!”
 
*GRRGL*
“BBUUUURRRPP!!!”
 
A large belch left Rock’s lips, and Roll’s panties splatted atop his gut. He giggled and put the adorable pair of underwear in his pocket.
Rock made his way to the sofa, careful not to let Roll’s struggling make him lose his balance and fall, and sat down.
His erect cock began poking down at Roll’s butt, which made her yelp.
 
“R-Rock! Not only do you eat me, you do stuff like this too?! You pervert!”
 
Rock ignores Roll’s whining and gives his tum a few rubs before giving it a big *SLAP!* making another belch erupt from his mouth:
 
“HWOOOAARRRPP!!!”
 
A few half-digested scraps of Roll’s red dress splattered against Rock’s belly. His stomach groaned and sloshed loudly as it worked hard to turn his adorable sister into fat.
Rock began to lose himself in the bliss of the moment, thrusting his erection against the bulge Roll’s petite backside.
He had never truly appreciated the fact that he was built with a fully functional digestive system until today. The feeling of having someone else digesting inside him was simply amazing, especially someone as delicious as Roll. Once Dr. Light rebuilds her, he’ll be sure to eat her again, and again, and again…
 
*GGRRUMBLE*
“PPLLLARRRRPPP!!!”
 
A rancid fart burst from Rock’s behind, making him blush in embarassment.
 
“Geez Roll, you stink… I guess that’s a sign my tummy is almost done with you~”
 
*GGRRGRLL*
 
As his gut began rumbling again, and a pressure began to build up in his behind, Rock quickly got up and pulled down his shorts, right before more flatulence began leaving his ass:
 
“PPPFRRTTT!!! PPRRRPPPTT! FLLAARRPP!! BBLOORRTT!!”
 
Tiny scraps of Roll’s dress as well as a few strands of her blonde hair could be seen flying out of Rock’s butt as he farted.
After his gassy outbursts had finished, Rock looked down at his gut. It was considerably smaller now, and Roll’s bulge was completely gone. His erect cock rubbed against his midsection.
Rock smirked and rubbed his shrunken belly.
He stared at the reflection on the TV, noticing that his thighs and ass were much plumper now.
 
“Wow, Roll, I was expecting you to just make me chubby, but you ended up giving me one heck of a butt~” Rock said as he felt up his large buttcheeks.
 
------*Disposal scene ahead*------
 
 
 
 
 
*RRGGRLLL*
 
Rock’s belly began rumbling once more, and a much larger pressure began to build up inside his backside.
 
“Urgh, is there still more? Oh wait, this is… Uh oh! I don’t think I’ll make it to the toilet in time… Guess I’ll just do it here then!”
 
Rock squatted down and began pushing with all his strength, and a giant log of shit began to come pouring out of his butthole:
 
“SSSHHRRRPPLLLLTTT!!!”
 
The large log began covering everything behind Rock. In it could be seen the remaining scraps of Roll’s dress, several strands of hair, and assorted circuits that had been mostly melted inside Rock’s stomach. It seemed like Rock had digested her very throughly, as no parts of her body could be seen in the increasingly long dump.
 
“BRRRFRRPPPTLLL!!!!!!”
“A-aaah!!”
 
Rock moaned loudly as Roll’s remains left his bowels. He had always secretly enjoyed the act of taking a refreshing dump after a delicious meal, but this was on a whole other level to any other dump he’d taken.
He huffed and puffed as he kept pushing out the enourmous log, and as the last bits of it came bursting out, so did Rock:
 
“SSSLAARRRPPPPFFFFF!!!!!”
*SPLOOORSSH*
 
One last disgusting fart ended up spewing a large amount of shit across the living room, covering the walls behind Rock, who had splattered the wall (and the TV) in front of him in his artifical semen.
 
“Phew… That felt great~ But…” he looked at the mess he had caused.
“I guess I’m the one who’s gotta clean all of this up now…”
 
Rock barely paid any mind to having turned his sister into a pile of crap, and was thinking only of how to clean up the mess that she had become. It didn’t matter anyways since the doctor could just rebuild her.
Though it didn’t really pass through his mind that that would be a rather difficult task, considering he had digested all of her parts…
Including her memory chip.
 
THE END