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Underground Journey	By : DeviousInnocent Category: +S through Z > UnderTale Views: 26335 -:- Recommendations : 0 -:- Currently Reading : 0
Disclaimer: Don't own Undertale. Don't make money off this story or this site.

Chapter List
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A/N: This still exists I guess. Yay. I might make some “bad ending” chapters now and then. We’ll see.

Frisk rocked on her fingers for a while, but found that despite having just awakened and being seriously horny from watching Toriel, she was still tired. Frisk groaned, and sighed, pulling her panties back up, curling up under the covers. She dragged a pillow into her arms and one tucked under her head. After a bit of fruitlessly dry-humping the pillow, the girl sighed, snuggled in and fell asleep.

______________

Frisk sat up. She was in a dark, empty void. Well, not totally empty. There was a patch of flowers ahead of her. She approached the pach and sat down, finding it to be comfy. She sat there and rested for a bit, trying to fathom what was going on, when a girl emerged from the golden flowers.

The girl appeared to be a human. She was taller and more lithe than Frisk, and paler. Her hairstyle was similar though, if a bit shorter-cropped and with reddish hair instead of Frisk’s much darker brown.

The strange girl walked, cloaked in the flowers as she idly tipped Frisk’s chin back, with a coy smile on her lips.

“Greetings.” She whispered, red eyes boring into Frisk’s. Frisk felt her mouth go dry and felt strangely worried about this mysterious figure. “...I am Chara.”

“W...what are you?” Frisk managed to gasp shakily, as she stared up into those alluring crimson eyes.

“Mm? Oh my, you’re astute. Noticed I’m not quite like you~?” Chara giggled, pursing her soft lips. “...Well, I was, once. Human. But then…. Well I died. Something happened.” For a moment, her confidence wavered, but Chara shook her head. “But now… I’m stuck with you. A ghost, I suppose.” She sucked a finger thoughtfully. “...Except I couldn’t quite get you to notice me until now… Curiouser and curiouser.” Chara smiled coyly, extending the finger under Frisk’s chin.

“...At least I’m stuck with a cute girl.”

Frisk blushed and squirmed. She took a half step back, but before she could, Chara had her arms around Frisk’s shoulders, pressing her soft lips to the shorter girl’s.

“Mmh.” She sighed into the kiss, breaking it slowly, a strand of saliva between their lips. “Sorry~ Hanging out with monsters makes you kinda… well, you know~” She gigged at Frisk who shyly glanced aside. She knew.

“...Hmm, speaking of…” She slid her hands to Frisk’s chest, squeezing. “...I’m jealous~!” She teased, as Frisk moaned faintly. “You have a gorgeous body, you know that honey?” Her voice was low and seductive.

“I-” Frisk shuddered as Chara’s hands roamed over her body, shamelessly. “I don’t know if I- nnh~”

“Shhh…” Chara soothed. “I won’t hurt you… not unless you want me to~” She giggled, sucking at Frisk’s neck, causing her to quiver in Chara’s grip. “I’ve been so lonely…” Chara whined, hands roaming Frisk more eagerly, gently prying the girl out of her clothes.

Frisk had to admit, the surprisingly gentle touches from the seductive girl was a nice change of pace from the overly-eager monster girls.

“Monsters are sweethearts deep down,” Chara noted, nuzzling Frisk as she finally got the tanned girl naked, and began slipping her own clothes off, effortlessly pressing her smooth form to Frisk’s, slowly tugging her to the soft bed of flowers. “But restraint isn’t one of their strong suits~” She nibbled at Frisk’s ear and the girl mewled softly.

“Ah… I-” Frisk shuddered, and gave in, hands roaming Chara’s body, eagerly, just as Chara fondled hers. Lips met again, this time holding out a long, needy kiss, Chara’s tongue softly invading Frisk’s mouth, fingers gently curling into Frisk’s wet folds.

Frisk uttered a whimper, Chara pressing into Frisk’s touch. Eventually, the self-proclaimed “ghost” girl broke the kiss, breathing hard.

Frisk shuddered as Chara withdrew her fingers, gently gripping Frisk’s wrists and playfully pinning them behind the curvy girl, a wicked smile on her soft features.

“Mmh… I think we’ll be wonderful friends with benefits~” She giggled, nipping at Frisk playfully. Frisk squirmed a bit- she couldn’t help it, the way Chara’s lips butterflied over her skin made her feel… she couldn’t explain it but god she wanted more.

Chara grinned, then suddenly slid herself off of Frisk, releasing her wrists and gripping her legs. She lifted, so that Frisk’s legs were over Chara’s shoulders, and Chara’s tongue was between her folds. Frisk squealed, first in surprise, then in delight as Chara began to lick and slurp at her, slowly. She bucked and moaned, as Chara’s dexterous tongue, while nowhere near the length and flexibility of the Froggit girl’s, but it was clear Chara did have one thing; experience. Frisk moaned and quivered, as Chara’s tongue probed and flitted, seeking out sensitive places, shifting in surprise patterns, and above all else, making the small human moan and gasp.

Chara lowered Frisk’s legs back down, licking her lips as she lay the girl on her back, before standing, strutting forth and idly lowering her own wet slit onto Frisk’s mouth.

“Go on, cutie.” Chara purred. “Just do your best.”

Frisk obediently began to lick- the taste was difficult to describe, but she had to admit it was quickly growing on her. She lapped at Chara’s slit, clumsily eating the slender girl out, but Chara’s moans filled the air, making it clear that she enjoyed Frisk’s effort more than any skill. The taller girl shifted and began returning the favor.

Frisk recalled that this was called “sixty-nine” or something.

The girls settled into a pleasant rhythm, their tongues exploring each other’s pussies, making good on their attempts to make the other cum. Before long, they were both trembling, using their soft tongues and fingers, desperate to finish. The girl’s cried out, Frisk cumming first, before managing, mid-climax, to cause Chara to squirt her juices, making a shrill, happy noise.

Chara moaned, and shifted slowly, adjusting herself so that she lay atop Frisk, face-to-face.

“Mm…” She smiled, planting a soft, much more chaste kiss on Frisk’s lips. “Glad I can still enjoy that… You might make it down here after all.” She nuzzled into the busty girl’s chest, relishing using the bust as a set of pillows.

Frisk shuddered. “...W-what do you mean I “might make it down here”...?”

“Well…” Chara looked up, smile fading, but she still radiated a sense of contentment. “These monsters here aren’t really uh, gonna try it, but… once you leave the ruins, they’re not just gonna fuck you.” She wrapped her arms around Frisk, voice low. “They’re going to try to break you. Ruin your mind and make you into a drooling sex-slave. But so far… Well, you’ve got a nice healthy libido and are a lot tougher than you look. So I don’t think that’ll happen to you.” She giggled. “Mm… Aww, seems like you’re waking up…” Chara pouted, kissing Frisk one last time. “...See you in dreamland, cutie.”

_____________________

Frisk sat up, gasping. Still in her underwear. There was a slice of pie on her bedside table. It was warm, and tasted of cinnamon and butterscotch. She felt… weird after eating it. It was delicious, but even though she wasn’t hungry after eating it, she didn’t feel “full”. It was weird and hard to explain. But a nice feeling.

_____________________

Toriel had found Frisk snooping in the basement. She admonished Frisk- told her the same thing Chara had about how the monsters out past the ruins would attempt to turn Frisk into nothing but a toy for their purposes.

But Frisk’s desire to explore, her curiosity, and the fact that if she didn’t leave meant she’d be trapped in these tiny ruins forever… While maybe it wouldn’t be so bad, especially with someone as kind as Toriel, she couldn’t do it.

“...You want to leave so badly?” Toriel shifted, blocking the large exit to the ruins. “...You are just like the others…”

Others? Frisk thought.

“There is only one solution to this.” Toriel took a deep breath, before suddenly rushing forward, lifting and carrying Frisk like she weighed nothing. The woman was powerful, far stronger than she looked and lugged Frisk upstairs, hurling her down onto Toriel’s large bed. “You will prove to me that you are strong enough to survive… And if you are not, you will not be able to leave me.”

She took a deep breath, before suddenly shoving Frisk so that she was pinned face down. “Forgive me for this, my child.” She whispered, yanking the girl’s jeans off roughly, delivering a sudden slap to Frisk’s perky ass. Frisk cried out, eyes wide at the aggressive shift.

“I must show you,” Toriel took a breath. “What being out there will be like.” Frisk glanced back and felt a rush of nerves and excitement. Toriel had cast off her dress, exposing her large, motherly curves… and her cock. Fully erect, it had to be at least twenty inches long and as thick as Frisk’s arm.

Toriel gripped Frisk’s wrists, pulling them back, the thick tip of her unsheathed cock prodding against Frisk’s pussy. “Forgive me for this.” Toriel repeated, before she began to push forward.

Frisk uttered a shrill scream as the titanic cock began forcing itself inside her. Frisk gritted her teeth, as it steadily pushed in deeper. Surely she couldn’t possibly take that entire cock? It must be impossible…

It then occurred to the small child that she probably could take it, thanks to Toriel’s magic. She felt a shock of pleasure, and uttered another scream as Toriel suddenly jerked, forcing in a few more inches.

Frisk took several heaving breaths as Toriel worked the throbbing cock inside her, harder and deeper. The monster woman was relentless, forcing it in deeper, pressing against Frisk’s cervix. She shuddered, tears threatening to form at the edges of her vision. Toriel grunted, slowly beginning to pull back, before suddenly thrusting in, forcing the cock past Frisk’s cervix and into her womb. The girl wailed in pain and reluctant pleasure. Frisk could feel the cock stretching the wall of her womb, feel the bulge in her tummy where the cock was, as Toriel began to fuck her with more rhythm, pounding the human girl doggystyle.

Toriel moaned, and Frisk could sense the goat-woman’s facade of doing this just for Frisk fading. While perhaps the woman did want to keep Frisk safe, she’d seen how pent up Toriel had been before.

“Ah!” Frisk cried out as Toriel reached around, roughly groping her large breasts, her own, even larger tits pressed into Frisk’s back. Something clicked in Frisk’s mind, giving her an idea that might help her… or it might backfire, but at this point she was willing to try anything.

“P-please…” She moaned, voice wavering in pitch. “...Please, harder… mommy~”

Toriel’s breath hitched, slamming forward balls-deep. “My child?!” She blurted, shocked, then suddenly seemed to redouble her efforts.

So Toriel has a mommy kink. Frisk shuddered, suspicion confirmed, as the furry woman began pounding her even harder than before.

Toriel gripped Frisk’s hair, tugging back lightly, whispering in her ear. “You like this, mm~? You like your mommy’s cock?!”

Frisk moaned, panting. Fuck, I think I have a mommy kink too, now.

“Y-yes mommy~!”

Toriel had a savage look in her eyes, thrusting and rolling her hips furiously, pounding the small girl without any mercy. “My little girl is a slut, isn’t she?!”

“Yes!!” Frisk mewled. “Yes Mommy! I’m a slut~! I love cock~!” She wasn’t acting anymore; Frisk found herself enjoying every moment of this.

Toriel purred, slowly pulling her cock from Frisk’s soaked pussy, flipping the girl so she was on her back, facing the goat woman. She slapped the cock on Frisk’s belly. “Look how big it is, look how much of Mommy she can fit inside you~”

Frisk shuddered, watching Toriel rolling her hips back, again only prodding Frisk with the tip.

“...Beg mommy to rape you.” Toriel whispered, licking her lips.

“P-please! Fuck me, force it inside me!” She begged her mother, panting softly. “Mommy, I need your cock…! Pound me, hurt me, I don’t care I need it~! I want it so, so-”

Toriel silenced Frisk’s begging by slamming the cock into Frisk’s pussy, hard and fast. She gripped Frisk’s legs, pushing them back, so that she was fucking downwards into the human, fucking Frisk in a mating press. Frisk shuddered, uttering wails of delight, shuddering, and very suddenly cumming, her cunt tightening around the cock burrowing inside her.

Toriel didn’t even slow down, fucking Frisk right through her orgasm, not losing any speed as she brutally slammed into her again and again.

“Mmh, did mommy make you cum~?” She growled. “Well you had better get used to it; Mommy’s nowhere near finished.”

Frisk shivered in trepidation. Toriel continued to slam herself into Frisk, who let out a little whine, as Toriel continued fucking her overstimulated pussy. Toriel was far more brutal than Frisk could have anticipated, her furry balls slapping against Frisk over and over again. Toriel suddenly hitched, her rhythm broken as she slammed in as far as she could go, burying herself deep within Frisk, pumping out thick ropes of cum into the girl.

Frisk squealed as the white-hot fluids poured into her, filling her womb. Toriel suddenly pulled her cock out, giving it several jerks and firing another thick rope, all over Frisk’s face and tits. Frisk panted for breath, but was given no reprieve. Toriel shifted forward, slapping her cock hard against Frisk’s face. She gasped, and Toriel silenced her by shoving the tip into her mouth.

“Hnn~ Choke on mommy’s cock, sweetie~!” She demanded, bucking her hips, forcing the shaft down Frisk’s throat. Frisk gagged noisily as Toriel shoved her cock down Frisk’s throat. Frisk gave out a whimper, struggling to suck in air through her nose. Toriel grinned wickedly as she bounced her cock into Frisk, who had tears streaming down her cheeks.

“What’s the matter baby girl? You can’t take mommy’s cock? Is it too big for your slutty throat~?” She viciously slammed all the way to the bottom, even forcing in the sheathe, resting her heavy balls on Frisk’s delicate face. Frisk choked noisily and Toriel relented, pulling back so only the tip was in Frisk’s mouth. She allowed the human to catch her breath, before dropping back down.

Frisk shuddered, vision swaying as Toriel rose up and slammed down, each brutal thrust down her throat making Frisk gag and struggle to see clearly, each thrust sent Toriel’s balls upon Frisk’s face. Toriel hadn’t been exaggerating earlier- she really was trying to break Frisk.

Toriel continued, several more brutal thrusts slamming down Frisk’s tight throat, before another load of cum was wildly pumped down her throat, thick ropes jetting down into Frisk’s tummy. Toriel again pulled out mid climax, to spray Frisk with monster jizz.

Frisk coughed a little, eyes regaining focus, staring up at the large cock, which Toriel held idly above Frisk’s face.

With two quick thwaps! Toriel delivered another two cock-slaps to Frisk’s face, grinning.

“Good girl. Mommy’s so proud~”

Frisk managed a bleak smile. “Th-thank you mommy… Eek~!” She squealed as Toriel lifted her, effortlessly picking Frisk up in the air, dangling her over the fat cock.

“Once more.” Toriel whispered. “And you’ll be mommy’s broken toy.”

Toriel raised Frisk high and with all her effort slammed her down, forcing her entire cock into Frisk’s ass.

Frisk came. She came instantly and hard. Toriel lifted Frisk and slammed her down again, making Frisk suddenly cum again. Toriel thrust her hips upwards, bouncing Frisk’s ass on her massive cock. Frisk drooled and screamed, cumming over and over again from Toriel’s brutal thrusts, the woman fully intent on breaking Frisk for good. She fucked and slammed her cock in, and Frisk’s mind grew blurry. But Frisk was flooded with determination- the urge to keep going, no matter what. And she could see straight again- she still felt the shocks and spasms of pain and pleasure run through her, but they no longer drove her thoughts.

That didn’t mean that Toriel’s utterly relentless fucking wasn’t the first thing she could think of. It was primarily the only thing in her thoughts. The massive cock was slamming into her ass, slamming into her again and again.

Frisk drooled and whined as Toril pounded her ass, occasionally delivering a vicious spank to Frisk’s rear. Toriel grunted, growling as she slammed Frisk down once again, cock throbbing inside the girl. For the third time, Toriel’s cock spurted a thick load into Frisk, and she let out a long, satisfied moan.

She held Frisk there for a few minutes, before slowly pulling Frisk off her cock and depositing her on the large bed, flopping next to the girl with her arms gently curled around her. Frisk was utterly exhausted, covered in monster-cum, sore, but immensely satisfied.

And most importantly, sane. Toriel hadn’t broken her. Frisk nestled into Toriel’s warm form.

“...Ah…” Toriel sighed, sadly as she looked into Frisk’s eyes. “...I can see it… You still will leave, won’t you?” She gently nuzzled Frisk. “...I will not stop you, when you do. But please, once you leave this place… be good, won’t you?”

Frisk nodded, giving the monster woman a gentle smile.

But for now, she needed respite. Toriel had certainly exhausted her.
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Underground Journey