Amber clapped her hands, gathering everyone's attention. "Alright, everyone, it's time to test those school smarts with a quiz! We're calling this round Messy Maths. You'll answer questions, and wrong answers mean mess--lots of it. But if you get the answer right, you get to pick a grid space on the board. Whatever mess is on the card, it goes to your opponent."

Liam wheeled in a cart filled with buckets of colorful slime, custard, syrup, and other gooey substances, all prepped and ready to match the cards on the board. The girls glanced nervously at the large game board laid out in front of them. It was labeled A1 through E6, each grid space hiding a card that detailed a specific mess and where it should be applied.

Amber gestured to the board. "So, here's how it works. Get the question right, and the mess on your chosen grid space will be used against the other player. Get it wrong, and your opponent picks a card to mess you instead. Either way, Liam and I will take care of applying it."

Beth adjusted her petrol-blue pleated skirt, the edges stained with remnants of earlier pies. Her white tights clung uncomfortably to her legs, now sticky and slightly sagging from earlier messes. Beneath her uniform, Beth had chosen her most daring knickers for the day--bright red with black lace trim. She shifted nervously, trying to adjust her skirt without drawing too much attention.

Eve's uniform was in slightly better shape--her grey skirt was neat and tidy, and her black tights had somehow avoided much of the mess so far, though she knew that wouldn't last. Both girls eyed the board apprehensively, knowing their luck was about to run out.

Amber turned to Eve. "Alright, Eve, first question: What's 12 times 8?"

Eve hesitated, glancing nervously at Beth, who was smirking. "Uh 96?"

Amber beamed. "Correct! You're safe--for now. Pick a grid space."

Eve quickly scanned the board, her finger hovering over the rows of letters and numbers before finally landing on C3. Liam flipped the card over.

"Custard on the head," he announced with a grin. "Sorry, Beth, this one's for you."

Beth groaned as Liam grabbed a bucket of thick, pale custard and stepped toward her. "Let's make sure this is nice and even," he said, tilting Beth's head slightly to ensure the mess would coat her hair fully.

The custard hit the top of Beth's head with a satisfying splat, spreading thickly across her scalp and down the sides of her face. It oozed slowly over her cheeks, dripping onto her blazer and pooling in her collar. Beth shivered as the goo slithered down her neck, soaking into the fabric of her shirt.

"Ugh, this feels disgusting!" Beth exclaimed, shaking her head in an attempt to fling some of it off, but the custard only smeared further into her hair.

Amber turned to Beth with a playful smirk. "Alright, Beth, here's your question: What's the square root of 144?"

Beth hesitated, nervously wiping some lingering custard from her cheek. She tried to focus but could already feel the pressure mounting. "Uh 14?" she ventured uncertainly.

Amber let out a mock gasp of disappointment, clicking her tongue. "So close! But no--it's 12. Eve, your turn to pick a grid space."

Eve grinned mischievously, her finger hovering over the board before landing on a square. "B2," she announced confidently.

Liam flipped the card over and chuckled. "Slime in the tights," he read aloud, grabbing a bucket of thick, green gunge.

Beth groaned, shaking her head. "Oh, come on, not again!"

"Rules are rules," Amber teased, stepping closer to Beth. "And I think I'll help out with this one."

Before Beth could respond, Amber reached down and lifted the hem of Beth's petrol-blue pleated skirt, holding it firmly out of the way. The reveal of her bright red, lacy knickers beneath the white tights was met with a playful whistle from Liam.

Beth's cheeks flushed instantly. "Amber! Seriously?" she protested, shifting uncomfortably as her skirt stayed hoisted.

"Relax," Amber said with a grin. "I'm just making sure Liam has room to work."

Liam stepped closer, gripping the waistband of Beth's tights just above her hips. With a practiced motion, he gently pulled them outward, creating a gap just big enough to pour in the slime. The cool air against her exposed thighs only heightened Beth's sense of anticipation and embarrassment.

The first dollop of slime hit with a wet splat just below her stomach. Beth flinched, a startled squeal escaping her lips as the cold, gooey sensation spread out inside the tights. Liam began to pour steadily, and the thick green gunge sloshed down, pooling against her knickers before seeping lower.

Beth squirmed helplessly, the slime coating her thighs as it slid downward, sticking to her skin and creating a heavy, slippery layer against the inside of the tights. The mess oozed around her knees and calves, clinging to every curve and crevice as gravity pulled it further down.

"It's so cold!" Beth gasped, her voice rising in pitch as she shuffled in place, trying in vain to escape the relentless flow of the gunge. The weight stretched the white tights noticeably, causing them to sag slightly as the slime settled unevenly.

Amber peeked over Beth's shoulder, laughing as the green mess filled the tights. "You're such a trooper, Beth. I think the red knickers really add a pop of color, don't you think, Liam?"

Liam grinned, stepping back to admire his work. "Definitely. But I think the slime really ties the whole look together."

Beth stamped her foot in frustration, which only made the slime shift and squelch further inside her tights. The sensation of the thick goo sliding against her skin was impossible to ignore, leaving her face flushed with a mixture of discomfort and embarrassment.

"This is so disgusting!" Beth exclaimed, fumbling to adjust her skirt now that Amber had let it drop. The sagging tights beneath her skirt, however, betrayed the full extent of her predicament.

"You're rocking the slimy look, Beth," Amber teased, laughing as Beth struggled to stand still with the shifting weight. "It really suits you."

Beth glared at Amber but couldn't suppress a reluctant grin. The sticky, gooey sensation was everywhere now, and each tiny movement sent the slime squelching against her legs.

"Just you wait," Beth muttered under her breath, shooting a glance at Eve. "Your turn's coming."

Eve laughed, but there was a flicker of nervousness in her expression.

Amber turned to Eve with a sly grin. "Alright, Eve, here's your question: What's 75 divided by 5?"

Eve bit her lip, her nervousness evident as she glanced quickly at Beth, who was still adjusting her tights filled with slime from the last round. Taking a deep breath, she guessed, "Uh 13?"

Amber clicked her tongue, feigning sympathy. "Oh, so close! The answer is 15. Looks like it's Beth's turn to pick a card!"

Beth, still giggling at her earlier revenge, scanned the game board, her finger hovering over a few spaces before landing decisively. "Let's go with C3."

Liam flipped the card and smirked as he read it aloud. "Oh, this is going to be fun: 'Pie to your private places.'"

Eve groaned loudly, her hands instinctively going to her skirt. "You've got to be kidding me!"

Amber laughed, stepping behind Eve and firmly grabbing the waistband of her skirt. "Come on, Eve, you know the drill. Let's get this done properly."

Eve squirmed as Amber lifted the grey pleated skirt high enough to expose her black satin knickers, the shiny fabric stretched snugly beneath her still-clean black tights. "This is so humiliating," Eve muttered, her face flushing a deep red as Amber adjusted her grip, ensuring the skirt stayed in place.

Amber wasted no time, grabbing the first pie--a classic cream pie with a hint of yellow custard peeking from the sides. "This one's for the front," she declared, crouching slightly to aim it perfectly.

With a satisfying splat, Amber planted the pie directly against the front of Eve's knickers, pressing it firmly so the creamy filling oozed through the thin layer of tights and saturated the satin fabric underneath. Eve let out a squeal as the cold, sticky mess spread against her, clinging to her most sensitive areas and trickling down her thighs.

"Ugh, it's everywhere!" Eve exclaimed, trying to twist away, but Amber held her skirt securely.

"Oh, we're not done yet," Amber teased, grabbing a second pie. This one was heavier, with a lumpy filling of mashed potatoes and gravy. "Time for the back!"

Eve groaned, bracing herself as Amber carefully positioned the pie against the seat of her knickers. With a decisive push, Amber smeared the pie upward, making sure the gravy and potatoes squished into every crevice. The warm, lumpy filling seeped through the tights, coating Eve's skin and pooling uncomfortably at the backs of her thighs.

Eve stamped her feet in frustration, her face beet-red. "Amber, seriously, you're enjoying this way too much!"

Amber just laughed, standing back to admire her handiwork. "You're right--I am. But we're still missing the final touch."

Liam stepped forward with a third pie in hand, a large one topped with whipped cream and chocolate sauce. "Alright, Eve, time to complete the look." He grinned as he raised the pie level with her chest.

"Wait, what--no!" Eve protested, but she had no chance to dodge.

With a theatrical flourish, Liam slammed the pie against Eve's chest, directly on top of her white school shirt. The impact sent cream splattering everywhere, soaking through the thin fabric and leaving a sticky, chocolate-streaked mess clinging to her skin.

"Can't forget the rub-in," Liam said with a smirk, pressing his hands against the pie and twisting it back and forth to ensure maximum coverage. Eve gasped as the cold filling seeped through her shirt, sticking to her bra and spreading across her stomach.

"Are you serious?" Eve exclaimed, trying to push Liam away as he stepped back with a satisfied nod.

"You look great," Liam said with a wink, tossing the empty pie tin aside.

Amber finally released Eve's skirt, letting it drop back into place--though it did little to hide the mess beneath. The front and back of her tights sagged visibly, weighed down by the sloppy contents of the pies, and the creamy mess on her shirt clung uncomfortably to her chest.

Beth doubled over with laughter, pointing at Eve's disheveled state. "That is the most ridiculous thing I've ever seen!"

Eve glared at her, though the bright red of her cheeks betrayed her embarrassment. "You just wait, Beth. I'm going to get you back for this."

Amber clapped her hands together, drawing everyone's attention. "Alright, enough chit-chat! Let's keep the game moving. Eve, I think you're messy enough for now--though I can't promise it'll stay that way for long."

Eve groaned, wiping futilely at the mess covering her chest. The sensation of mashed potatoes squishing inside her tights and cream sticking to her bra was unbearable, but she knew there was no escaping the chaos of the game.