Chubby Youtubers/Egos Oneshot, Book 3

Marvin x Slime Reader

A/n: Requested by P4ttka

Marvin has dedicated his whole life becoming a magic user wanting to become the very best and to be known across the globe he doesn't care about the fame or fortune he just wants to leave his mark on the world. Marvin knows first-hand that magic at times can be unpredictable, dangerous if fallen into wrong hands but at the same time the magician saw the potential of magic to bring people together and change the world for the better, magic is like cooking it's delicate one wrong move and things could end up becoming a mess and takes practice to learn the ropes.

It was during Marvin's early years he was still a beginner learning the delicate nature of magic that he made a slight error in potion making leading to him learning from his mistakes but also his slight error gave him a friend or more specifically he accidentally created himself his first friend. An explosion of smoke slowly cleared from the cauldron revealing a sentient medium height humanoid slime creature that appeared to be firm yet gooey in appearance, Marvin was rooted to the spot his heart pounding in his chest his inexperienced mind racing with thoughts of this slime raging and destroying everything in its path. Minute's past Marvin watched on in mute surprise watching the slime that took the appearance of a (Male/Female) their eyes never blinking looking down at their quite human hands flexing their fingers before looking up meeting the magician's eyes and looked almost afraid.

"Who am I?"

That one simple held so much raw emotion that Marvin realised he didn't create a monster that would hurt anyone he created a lost soul who has no experience living in this world who was alone and frightened which at that time Marvin could relate to the slime. At this point in his life Marvin could clearly see what he had to do he had to treat Magic with nothing but seriousness and also to teach and grow the humanoid slime showing them the wonderful world that was open to them.

It was that day Marvin grew up becoming the man that he is today becoming close friends with the slime they called themselves (Y/n), no matter where one went the other quickly followed them becoming the ultimate team. This worked well for many years you sticking impossibly close learning about the outside world from Marvin and even the rest of the Septic's completely amazed hearing about the wacky stories the egos tell you but the more you hear about the outside world the urge to explore the unknown the urge to step outside intensifies but deep down you knew Marvin wouldn't let you explore in fear of someone hurting you.

"Marvin! Why won't you let me leave? You and everyone else told me these amazing adventures and I want to experience what this world has to offer" You argued following your best friend into his bedroom and slammed the door behind you the loud slam echoed across the house. For the past several weeks you two have been having the same arguments over and over you wanting to go out see the world but Marvin refused putting his foot down and acting like a father figure send you to your bedroom.

"No means no (Y/n)! The outside world can be dangerous you could get hurt" Marvin weakly argued back knowing his argument was quite weak seeing that you were made out of regenerative slime substance that quickly reproduce and heal yourself if any part of your body went missing.

"Have you forgotten about the time Anti tried to stab you and I used my body as a shield all the stab wounds swiftly healed in a matter of seconds.. Marvin you always been a dad.. the only family member I had, why won't you let me leave?" You pleaded becoming desperate wanting to know the real reason behind Marvin's choice walking behind him you placed a hand on his shoulder trying to comfort him.

'Because I'm afraid of losing my first best friend! Afraid that you make better friends and never come back' Marvin thought sadly to himself but the endless hours of arguing for weeks has started to take a toll on the magician a blinding headache drilled in his head, nostrils flaring and hands clenching Marvin accidentally snapped turning on his heels and smacked your hand away eyes wide with fury glaring at you.

"WE ARE NOT FAMILY! AND DO YOU WANT TO KNOW WHY? REALLY??? HAVE YOU SEEN YOURSELF (Y/N)? YOU'RE A MONSTER" Marvin screamed his voice could be heard across the house the egos that scattered doing their own things stopped what they were doing in shock never hearing Marvin talking about you like that before and they were disappointed in him. Just as the words left his mouth Marvin instantly regretted, he'd took a step forward towards his friend tending to correct and comfort you but instantly stopped as you shook your head letting out a broken yet angry sob.

"I was born in this world without a family.. I counted on you Marvin for guidance and I looked up to you.. With you I thought I had a family but.. I.. I don't have anyone do I? And why should I stay if you hate me and see me as a monster" You struggled to get your words out in between sobbing your heart out hands placed protectively over your chest forcing yourself to turn away hiding the tears that fell from your eyes the sight made Marvin feel guilty like someone ripped his heart out.

"(Y/n) I didn't mean that, it was said when I was angry! You gotta be-" Marvin took a step forward hating to see his best friend crying intending to comfort them but as he softly talked his speech got cut off by a blur of a familiar colour of his friend's slime body feeling something wedging into his gaping maw and pumping down into his throat, looking down Marvin's eyes widened seeing your arm was stretched outwards lodging inside his mouth.

"No Marvin you listen to me! You think I'm defenceless? Well I'm going to prove to you I can protect myself while not harming anyone, I think that will prove I'm not a monster" You hissed narrowing your eyes at the magician pumping more slime into him. Letting out a barely muffled whine Marvin froze on the spot never seeing his best friend filled with fury that was directed at him, Marvin could oddly taste the slime to be a unique changing fruit going from apple to lime to tasting strawberries.

Glurp

Gurgle

Hearing his stomach giving out strange noises while feeling an overwhelming sensation of fullness like eating a large meal Marvin glanced down his eyes caught sight of his snugly black vest that fitted him perfectly now steadily started to bulge outwards. Marvin's slim stomach started to expand forced to keep the slime inside of him turning from the size of a bowling ball to easily looking like the ego was hiding a basketball under his vest, the two shiny buttons that were shaped of a heart softly creaked stretching and doing their best to contain the swelling mess.

'How is this possible? I'm sorry (Y/n) I'm truly am sorry' Marvin thought waving his arms in the air desperately and took a step backwards the back of his leg hit his bed causing him to fall backwards laying on his back heavily. You couldn't help but smirk a little easily moving your arm a small bit and kept pumping the ego with more slime intending to do some damage, two loud pings suddenly came out of nowhere Marvin could feel the cool air brushing against his now exposed rounding gut that swelled higher into the air trapping the magician on the bed. Marvin lifted his head off the bed letting out quite the panic muffled groaning noise seeing his large boulder taut belly stuck out like a sore thumb slowly blocking the view of his best friend but before it could fully hide his friend the arm inside his mouth retracted pulling out.

"(Y/n) wa-URP" Marvin tried to speak but a loud thunderous belch cut him off as he moaned his hands rubbing the side of his gut not even attempting to move the overwhelming feeling of being stuffed trapped him on the bed.

"Don't (Y/n) me Marvin! You be like this for a good two days before it softens you up! Nice knowing you Marvin but from now on let's be strangers" you said strictly without any emotion in your voice turning on your heel you opened the door and slammed it behind you ignoring Marvin's shouting for you to come back. Taking a calm steady breath, you elegantly walked down the stairs the ideas and thoughts about finally getting to explore the world made you have a bounce in your step which caused you to nearly run over poor Chase who was about to walk upstairs to his own bedroom.

"Whoa slimy McGee! Someone is pretty excited where you headin?" Chase asked jumping out of the way in time and gave you finger guns which you happily returned.

"Sorry Chase but destiny is calling me and it's about time for me to have my own adventures" You called out waving goodbye towards the dad ego grabbing the front door handle and pulled it open feeling the cold air flowing in.

"Oh! Chase, please tell Marvin that he can kiss my butt" With that you shut the door behind you and started your new life heading into the exciting world.