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It was a hot day of summer in Hometown, but despite that Kris was still wearing their oversized sweater. Weather be damned, they weren’t about to forgo that comfy fabric. Wearing light bottom wear should be enough, like some tight bike shorts that left their legs and thighs exposed lightly, and helping Kris ventilate their body and not overheat.
Susie was walking beside them, also wearing lighter clothes, like a plain white shirt that left little to the imagination when looking at her chest, and her regular purple pants.
They were just hanging out as usual, walking down the streets of Hometown with nothing in their mind or any sort of plans about what to do. Just passing time.
“Dude. I’m so fucking bored.” Susie finally said, crossing her arms behind her head. “What should we do now???”
Kris thought about what to do for a while, and got an interesting idea. They stopped and faced Susie directly.
Then, without saying a single word, they wrapped their fingers into a ring shape, opened their mouth, and made a thrusting motion with their hand close to their mouth.
Despite not showing much of any emotion doing it, Susie could tell Kris was pretty proud of themselves, almost seeing sparkles around their face. Susie narrowed her lips, a light blush crossing her face as she stared at Kris, stunned.
“... Let’s go to your house. Now.”
Without a moment to waste, both teens ran towards Kris’ house, since Toriel would still be out for a while. They ran straight towards Kris' room, slamming the door closed.
Susie wouldn’t admit it, but seen Kris do that motion with their mouth open like that, letting her see their wet and warm human mouth had turned her on to no end.
She sat on the edge of Kris’ bed, and they immediately went to their knees, getting in between Susie’s legs and sliding that bulging tent out of her pants.
Susie gasped as her massive cock was freed from her pants, so big that Kris couldn’t completely wrap it in their hands. Susie panted and contained her urge to moan as Kris grabbed the base of her throbbing cock with both hands, while opening their tiny mouth just as the tip.
Kris pulled the little bit of foreskin still wrapping her tip down, pressing their hot and wet tongue all over her tip.
“Dude… You are such a slut~ Did you really want to suck my dick that badly~?”
Not even Kris could maintain a straight face at that little teasing, smirking right back at Susie, and licking her tip again, catching the little bit of precum leaking from it.
“Fuck dude~ you really know how to service a dick~”
Susie smirked as well, showing them a smirk full of sharp and pointy teeth. Not intimidated on it just a little bit, Kris leaned closer to Susie’s tip, opening their mouth wide, and wrapping their lips around the very tip.
Susie moaned, blushing deeply after they caught Kris’ red eyes staring right at her even through their bangs.
“Not a word, or I’ll kick your ass.”
She growled, but couldn’t help but still smirk at them, unable to keep the threatening and scary facade. Truth be told, she was so horny she didn’t want to stop whatever Kris wanted to do.
They started swirling their tongue around Susie’s tip, rubbing the edge of her cock head and the base of her shaft, poking the tip of their tongue on all her sensitive spots, and even getting bold by poking at her peehole whenever it started leaking more precum.
Susie didn’t care about trying to keep herself from showing she was really enjoying th blowjob, and just leaned back, panting and breathing heavily as Kris’ tongue played with her cock. They were starting to move their hands up and down her shaft, one of them holding the base in a tight grip while the other explored the entire shaft.
Susie groaned and held on the sheets of Kris' bed tightly. Kris didn’t break eye contact even for a moment, their red eye staring up at her with an intense determination, intent on seeing just every little response they brought out of her while sucking her dick.
Kris swirled their tongue around her cock head, rubbing directly into the edges of it, right where the rest of her shaft started, while their hand moved up and down her shaft, going from their other hand to their lips, then back to their hand and back to their lips.
Susie’s dick was throbbing so hard already, but she refused to cum yet, not intending to give Kris the satisfaction of letting them see the face she makes when cumming so easily.
Kris started moving both their hands up and down her cock, and Susie started feeling the pressure building up in her crotch. Seeing her break eye contact and start to struggle to keep herself from cumming, Kris went a step further.
They started moving down their head along with their hands, the double handjob they were giving her turning into a sloppy blowjob as Kris felt her throbbing cock stretch their jaw open and poke against the back of their mouth.
“Ahh~! Fuck, Kris~! You are such a nasty freak~!”
Susie smirked, drooling after seeing her best friend go down on her cock, leaning so deep, making their tiny human hands hit the base of her cock while they shoved half of her monster cock inside their mouth.
It was hot and slimy, covered in Kris saliva, making it so when they pulled back their hands grabbed into the saliva covered shaft, and then when they sucked on her cock again, they lubed the rest of her cock in their saliva.
Susie’s pelvis was starting to itch and convulse forward, telling her that she was near her limit, but she could still see Kris’ red eye stare up at her whenever their hair moved out of the way as they went down on her cock.
Susie grinned at them with a smile full of sharp teeth, drooling like a horny maniac.
“If you like my cock so much how about you really take a taste~!”
Unable to hold back any longer, Susie grabbed Kris by their head and shoved them down, with her cock going all the way down their throat. Kris choked as their hands were pushed out of the way, with Susie grinding their face into her hips.
Susie groaned as she finally unloaded herself inside of Kris’s mouth, cumming down their throat and shooting rope after rope of cum directly into their stomach. Kris gagged, tapping Susie on her wrist telling her to pull out already.
Susie stayed a few more seconds using Kris’ throat as her personal cocksheath before finally pulling out, letting Kris take a fresh gasp of air.
Kris coughed and gagged, trails of cum connecting their mouth and throat with Susie’s cock. They swallowed all the cum in their mouth, before they could finally breathe properly.
“Dude, you got an amazing throat~ Wouldn’t mind fucking it whenever I’m bored~”
Susie said with a toothy grin. Kris looked up at her with a defiant smile, red eyes piercing directly into her soul.
“Heh, do you still want some more~?”
Kris leaned back, sitting on the floor and pulling their sweater up. Susie widened her eyes, seeing the absolute messy state of their bike shorts. Kris had a very visible tent showing their erection, as well as multiple white splotches around the tip of their tent.
“Damn, dude~ You came just from blowing me~?” What a slut~”
Kris stuck their tongue out, at first playfully just to tease Susie, but they then moved their hand close to their mouth. Kris spread their index and heart fingers, and put their tongue in between them, coating them with their saliva.
Susie’s smirk flinched a bit, as her cock started growing again, veins popping around her shaft as it slowly rose back up again.
Kris smirked, and moved their wet fingers down, right in their bike shorts. They rubbed the saliva covered fingers around their tent, catching a few strands of cum, before moving lower, and pressing their fingers into their butt.
Susie widened her eyes, seeing Kris insert their fingers inside their asshole and spread it even through the bike shorts.
“You little shit!”
Susie grabbed Kris by their sweater, pulling them up.
“You are really enjoying yourself over there teasing me, aren’t you?”
Kris merely shrugged their shoulders, not minding the rough treatment from Susie. The monster felt her now erect again cock rub against Kris’ inner thighs, as well as the tent in their bike shorts rubbing against her belly.
They then made a ring with the fingers of one hand, and inserted a finger from the other hand inside it. Susie was panting heavily, breathing down Kris’ face, with her lust increasing by the second.
“You really want to mess around, huh? Then you asked for it!”
Susie opened her mouth, showing Kris her watering mouth full of sharp teeth, and closed it around their mouth, kissing them deeply, not caring about the heat, and just allowing themselves to melt in it.
Kris moaned into Susie’s mouth, returning the kiss, feeling her tongue shove theirs back inside their mouth. Susie held Kris tightly by their sweater, kissing them so deep they both forgot to take a breath, while they rubbed their dick against each other’s body.
When Susie finally pulled out of the kiss, leaving a strand of saliva between their mouths, she throwed Kris on top of their bed, and wiped the drool out of her mouth.
“Fuck dude, I’m gonna fuck you until impregnate your human ass!”
She lunged at them with her arms shot forward and maw wide open, landing on top of them, with her cock pressing directly into their shorts and their own dick.
Susie closed her mouth around their lips again, silencing Kris into another kiss, pinning them down in their own bed. She grinded hercock into theirs, feeling the size difference of a futa monster cock against a regular human one.
Susie’s hands traveled down, grabbing Kris dick in a tight grip, and loving the little squeal they made against her mouth. Susie started jerking them off through the bike shorts, and lined the tip of her cock into their asshole.
She pulled away from the kiss, her tongue dragging out from Kris’ mouth, as they tried to suck it in.
“You hungry slut~!” Susie licked their entire face, sticking their hair back, and revealing their hungry, lust filled red eyes.
She thrusted her cock right in between their asscheeks, not caring about the bike shorts, and using them as a makeshift condom for her cock.
“Hmmm~ You are tight~”
Susie was drooling like crazy, and staring down at Kris with barely contained lust and hunger. With her cock finally inside them, Kris was also barely able to contain themselves, and leaned forward to kiss Susie again, not caring that now she could see their face clearly.
Susie returned the kiss hungrily, as Kris wrapped their arms around her, and crossed their legs around her waist. Susie didn’t remove her hand from their crotch, keeping it trapped as she started thrusted deep inside their asshole.
With every thrust, Kris’ entire body rocked, moving their dick inside her hand and jerking it off without having to move her hand at all, just by thrusting her hips.
Kris started moaning into her mouth, with Susie breaking the kiss to lick their face and neck, and leave small nibbles all over it, marking their neck with her love bites.
Kris’ voice escaped their mouth as Susie kept on thrusting inside of them, rocking the bed and making it creak with every thrust, with Susie on top of them, both teens clinging into each other desperately, until Susie finally pressed her entire body on top of Kris, slamming her dick all the way inside of them.
Susie groaned into the sheets, face pressed into them as Kris felt her cock shoot a hot load of her cum inside of their ass, making them cum with her.
The bike shorts weren’t as good as a condom, so both their loads leaked and shot through the shorts, but neither cared.
Susie pulled herself away from on top of Kris, to not squeeze them with her body, and both teens stared up to the ceiling of the room. Strands of cum leaked from Kris’ ass and tent on their dick, connecting them with the cum trailing from Susie’s tip.
“Well, that sure was something, dude.” Susie grinned, catching her breath.
Kris turned to their side to look at her, and slipped a hand under her shirt, groping her tits directly. Susie arched an eyebrow at them, with Kris smirking back at her, poking the inside of their cheek with their tongue and making a sucking motion with their hand again.
“You really are a freak, you know that~?”
Susie smirked, getting back up again as her cock hardened back again.
And that’s how they became best friends with benefits.