Birds sang as the crystal blue water trickled through the nearby brook. White, fluffy clouds hung upon the brilliantly blue sky. The scene was idyllic, unnaturally beautiful as the two teenagers ran around a tree. The unknown boy came to a stop, huffing as he smiled.
“What’s wrong? Getting tired already?” The girl’s golden-blonde hair had a high-set ponytail and multiple braids. Grass and dirt stained her sleeveless orange shirt and green short-shorts. Her exposed midriff was trim and flat, and her long legs propelled her away from the tree. The girl gave a friendly smile, her swirled green eyes showing care.
“Kind of, we have to get back home!” The boy looked to the sky. “We have to start back soon or my dad will kill me!”
“We have to go into the cave first.”
“Rikku, we don’t have time! We have to get the ship ready.”
“Sure we do. The ship isn’t leaving until the morning anyway!” She trotted down the path, following the stream as it wound through the wooded area. The boy grumbled as he followed along. She hopped along some exposed rocks in the waterway, balancing as she danced atop the dry sections. They came to a partially obscured cave entrance and she didn’t hesitate to head inside.
“Rikku, come on!” There was a long silence. “Rikku? I’m serious!” The boy squinted, looking into the darkness.
Hurried footsteps came before Rikku jumped from the shadows. “Sorry, we have to take care of something!” She grabbed his shoulders. “Stay back, I’ve got this!” She readied her claws as she turned to face what came.
“What are you talking-”
A green blob appeared from the darkness, thrusting a section of its body outward to grab both of their legs. The ooze split apart and flowed around them, having two blobs encasing their bodies from the waist down. The slimes brought them inside and down to a naturally lit stone shelf. They struggled, but it was holding tightly. Their clothes parted and floated outward silently, disintegrating before their eyes. The pouch holding her knives also vanished into a mist.
“Just a little setback!” Rikku struck the top of the slime with her claws, but only a small ripple rolled out along its translucent skin. It sent out a pseudopod, covering her claws, disintegrating them as well. Her front and back opening grew wider as the creature parted her legs. Her slim stomach puffed out, accepting the creature’s body as it slowly invaded her. She hit the creature with her bare hand, but it was in vain.
“It’s going inside me! Grab one of those pointy rocks over there!”
The dark-haired boy frantically tried to find a makeshift weapon, but he couldn’t reach. “It’s too strong!” He screamed and flailed his arms. “It’s going in me too!”
Rikku looked around, reaching for a stalactite that hung above. She snapped a chunk off, using it to stab the creature that enveloped her. Her attack grazed aside, sending the stone to skitter along the rock beside them. A small spark jumped as the stones clashed, causing the ooze to quiver and pulled away. She took another hanging stone and scraped it along the wall, the sparks making the creature let go of her entirely.
She stood with her hand upon her hip, feeling full as her expanded belly housed a large portion of the slime. Naked from the waist down, only her orange shirt remained and it too was dissolved around the bottom. Her soft, youthful skin remained unblemished as she waddled closer. She put a hand on her expanded stomach, feeling it move.
“Ugh, so much!” She looked at the boy who was far larger. The slime had reformed and was entering the boy as he watched her, making his belly grow at a phenomenal pace. “Oh no! I’ll help!” She moved heavily, striking the stone floor to create a spark, but it was too late. The final remnant of the goo disappeared into the living vessel. They stood, awestruck by the encounter for a time.
“We have to get home!”
“I can’t bring you home like this!”
“My parents will know what to do, just help me!”
“We are going home!”
“Ugh, geez, okay, okay!” She took his arm over her shoulder and they both crawled up to the cave’s entrance. They moved slowly and carefully, feeling their bellies rumbling as the creature shifted inside. They made it back to the stream when the boy pushed her onto her back. Rikku planted her butt into the soft grass, unable to close her legs with her bulging tummy. Without warning the boy jumped atop her, pinning her beneath his mass.
“What are you doing?!”
His hard cock nudged against her pussy. “I can’t help it, I have to!”
“You get off of me this instant!” She struggled to push him away, but it only allowed him to penetrate her. It was unexpectedly wet down there as he moved and when he was all the way in she felt something moving.
“I can’t stop it!” He cried out.
“What the-“ The boy’s cock swelled inside her painfully, making way for the fluid. “It’s going in me again! Stop it!”
“I can’t!” He tried pulling away, but his shaft was completely stuck, pumping her full of the thick ooze.
The couple grunted and writhed, trying to pull apart from the forced embrace. They stopped as they realized his belly was shrinking as hers expanded. She took more and more, growing huge with the inhuman pregnancy. Rikku dug her hands into the soft soil, screaming as her inflating midsection folded her shirt backwards.
She suddenly went silent as the sides of her stomach rolled onto the ground, rumbling as the final portion of creature travelled into her. The boy was finally allowed to separate from the burdened girl. He fell backward, looking at her long, spread legs. He was still hard and she wasn’t able to stand.
“Uh, can I?”
“What?” She craned her neck to see the horny boy looking at her. “No! Help me scare this thing out!”
“I was already doing it, just let me… for a minute.” He crawled closer, moving above her distended belly.
“No! Do not go back-“ He already slipped back in. “Ugh, stop, it feels weird.” The boy ignored her, moving slowly and deliberately. “Get out of there right now!” She pushed against his shoulders, inadvertently causing it to tense upon him. The boy paused, staring into her eyes before she felt it moving down there. “What happened?”
“I couldn’t-“ He gasped with delight.
“Ew, it’s warm this time. Did more slime go in me?”
The boy got to his feet, looking at her with worry. “Rikku, I have to go get my dad. We’ll come back to help you, I promise!”
Before she could answer he was already running through the stream. She punched her stomach angrily, but that only made the creature push outward, causing her immense pain. She grumbled, laying her head back into the grass, looking at the scattered white clouds. “Ugh, well, at least it’s a nice day.”