Medusa on Main Street (Kaiju Medusa Lamia TG)

It was an average Tuesday in the city.
You know—coffee, car horns, capitalism, and a ten-meter-tall snake-woman slithering down Main Street, turning sidewalks into slip ‘n slides and traffic into modern art.

Alarms blared.
People screamed.
One guy dropped his hot dog and wept.

“Sorry! Sorry! Coming through!”
The giant purple-scaled lamia waved an apologetic clawed hand, nearly swatting a traffic light in the process.
A dozen pigeons exploded into the air. A parked car was now slightly less parked.

Her serpentine body twisted through the city like a confused parade float. Snake hair writhed in the air, hissing at everything and nothing, while her massive bust (still somehow tastefully covered) bounced with every apologetic wiggle.

On her shoulder, lounging like she owned the world, sat a tiny woman in a black kimono, legs dangling casually.

“Y’know,” said Nagisa, the orange-haired goddess of darkness, sipping bubble tea through a black skull-shaped straw, “The view from up here is kind of amazing. I can see into people’s apartments. Ooh, that guy’s doing yoga!”

“Nagisa, I shouldn’t be this big!” wailed the giantess, slithering carefully around a hot dog stand and only partially flattening it. “I can’t even go to the bathroom anymore without blocking five lanes of traffic!”

“Pfft. Can’t or won’t, Matthea?” Nagisa smirked, tapping her straw against her chin. “Honestly, I think this is an improvement. You’ve got presence now, authority, jiggle physics.”

“I have to turn sideways to get through intersections!”

“You’re a noodle. Just bend.”

Matthea let out a long, exasperated sigh that knocked over a motorcycle rack.

“I just… this isn’t fair! I was human an hour ago! I had knees!”

Nagisa gave her a lazy shrug. “Well, whose fault is that?”

Matthea blinked, coiled awkwardly around a bus stop, and growled, “Yours?”

“Noooope.” Nagisa grinned. “You’re the one who wished to ‘see more monster girls,’ remember?”

Matthea recoiled so hard her tail knocked over a billboard for dental implants. “This is not what I meant!”

Nagisa, smirking like she’d rehearsed this moment in the mirror: “Oh, I don’t know… you’re seeing plenty of monster girls now. Starting with that one friend of yours, right?.”

Matthea's snake hair hissed in unison as she groaned. Somewhere behind her, another building’s windows shattered. A newly-transformed slime girl emerged from the crowd, blinked at her gelatinous arms, and immediately started livestreaming.

Matthea’s snake hair drooped in shame. “Okay… yes, I said I wanted to see more monster girls. But that’s not—!”

“Not what you meant?” Nagisa raised an orange eyebrow, eyes sparkling. “I granted your wish perfectly. You see more monster girls every time you blink.”

“I didn’t mean turning everyone into them!”

“You didn’t say not to.”

Matthea huffed, accidentally fogging up every window on the street. “You could’ve at least explained the gorgon eyes part!”

“Oh, come on,” Nagisa said, swirling her bubble tea dramatically. “Don’t act like you weren’t dying to test them out. Let’s talk about your little ‘experiment’ with your friend Marcus.”

Matthea froze. “Don’t.”

“Oh, let’s,” Nagisa said with glee. “You looked right at him like, ‘Oh no, what if something terrible happens’ and then stood there and watched, slack-jawed, while he turned stone for stone into a golem girl.”

Matthea buried her face in her hands. “It was for science.”

“You were giggling, Matthea. Giggling like a little girl watching a makeover show where the twist is ‘Now You’re Granite!’”

“That was one time—!”

Nagisa leaned in closer, grinning devilishly. “One time? You watched every second. First the muscles, then the boobs, then the ass, inflating like it had its own gravity—”

“I didn’t mean to stare!”

“—and then her voice dropped three octaves and suddenly she’s saluting you like some sexy stone soldier and calling you ‘Mistress.’”

“I—I was just confused!”

“You said, and I quote,” Nagisa cleared her throat and mimicked a deep voice: “‘Whoa. That was kind of hot.’”

Matthea coiled up in humiliation, face flushed violet. Her snake hair hissed softly, like it too was judging her.

Nagisa took a victorious sip. “So. What are you complaining about again?”

“…I mean…” Matthea mumbled, “It was kinda cool…”

“Aha!” Nagisa pointed triumphantly. “See? You’ve got fabulous taste and a terrifying power. Classic heroine setup.”

Matthea’s tail coiled tighter beneath her. “Okay, fine! Maybe Marcus looked kinda great with those boulder boobs. But nowhere in my wish did I say I wanted to be turned into a monster girl myself!”

Nagisa lazily kicked her feet, the hem of her kimono swaying in the wind. “Oh no, you totally did. Not in words, maybe… but in vibe? Absolutely. And more importantly…” She poked Matthea’s temple with her straw. “What did you think would happen when you looked at yourself?”

“It was an accident!”

“You opened your front camera.”

“I was taking a selfie with Marcus!”

Nagisa shrugged. “And what did we learn?”

“That selfie mode is a trap!”

“Correct,” Nagisa said, holding up a finger like a proud teacher. “But give me some credit! I did install a few failsafes.”

Matthea’s pupils slit into skeptical little lines. “What failsafes.”

Nagisa counted on her fingers. “Okay. First time you see yourself? Just turns you into a girl. Y’know~ Boobs, bigger butt, no more ding-dong between your thicc legs.”

Matthea’s expression twisted between outrage and… distant nostalgia. “Okay. I mean. That felt… incredible. Like I downed three shots of pure euphoria and got hugged by a warm thunderstorm.”

Nagisa grinned. “Aww. See? Best Tuesday ever.”

Matthea blinked, then snapped, “How was that a failsafe?!”

Nagisa: “Because looking into a mirror once doesn’t turn you into a kaiju.”

Matthea: “And you thought I wouldn’t check myself out after turning into a chick?!”

Nagisa: “That is beyond my area of expertise.”

Matthea’s entire upper half flopped forward dramatically, flattening a bus stop like a cardboard box. Snake hair flailed. “You set me up for failure!”

“You set your thirst trap, not me. I just lit the fuse.”

Matthea scowled as her massive tail curled behind her, unintentionally blocking three lanes of traffic and crushing another food cart.

“Okay. First mirror, fine. Selfie accident. But the second time—”

“Ohhh yes,” Nagisa purred. “The bedroom mirror. What a friend, ain’t it?”

Matthea turned pinkish-purple. “I just wanted to see what I looked like! You don’t just… Wake up with a new body and not check if you’re cute!”

Nagisa spun her straw like a magic wand. “You sprinted into your room. You posed. You flipped your hair… Well, you tried. It hissed at you. You still struck a pose.”

“It was for science!”

“It was for thirst, and I support that,” Nagisa said brightly. “But come on. Giant full-body mirror? Alone in your room? That’s not accidental, that’s practically an invitation to turn into a monster girl.”

Matthea crossed her arms, an impressive feat with that much frontal load, and mumbled, “...That’s when the snake hair and tail happened.”

“Oh yes,” Nagisa nodded solemnly. “Your legs melted together like romantic spaghetti noodles. Boom! Snake tail. Schlorp. You remember the sound, don’t you?”

Matthea winced. “It was weirdly satisfying.”

“And the hair,” Nagisa said dreamily, reaching up to pat one of the smaller snakes, who flicked their tongue at her affectionately. “Hissing, writhing, moody. Like extensions with attitude.”

Matthea looked away, flustered. “...They’re kinda fun to play with.”

Nagisa smirked. “Oh, honey. You didn’t just play with them. You ran your hands down that shiny new tail from top to bottom, whispering ‘snek snek snek’ under your breath.”

“I was curious!”

“You were enjoying it. I have eyes.”

A distant crash interrupted them, Matthea had accidentally glanced at a passing office lady. With a blink and a puff of magic, the woman now stood in a power skirt and horns, mooing in shock as she suddenly bulked up into a confused but oddly confident minotaur.

Matthea winced. “Sorry! It’ll wear off! …Probably!”

Nagisa waved. “Welcome to the club, hon!”

Two seconds later, she looked at the ice cream vendor. Poof! Mermaid. Tail flopped over the counter. She blinked at her reflection in a spoon and started crying, then laughing, then taking selfies.

Matthea facepalmed. “Why does this keep happening?!”

Nagisa popped another tapioca pearl and said cheerfully, “Because snakes have trouble closing their eyes, duh~. Comes standard with your tragic heroine package.”

Matthea groaned, her coils crunching a fire hydrant like a soda can. “That's not how it works!”

Nagisa beamed. “You are entitled to your own wrong onion~.”

Matthea narrowed her eyes. “Wait. How did you even see all that? I left you downstairs with Marcus… I mean, Marcia.”

Nagisa twirled her straw like a wand. “Please. I’m a goddess. I grant wishes. You think I don’t have remote viewing? Comes standard.”

Matthea turned a deep, violet blush.

Nagisa grinned like a cat who’d just eaten someone’s secrets. “Yes, that means I also saw you strip down to your bra and have some fun with your boobs in front of the mirror.”

Matthea’s blush somehow deepened into the ultraviolet spectrum.

Nagisa shrugged. “Hey, I don’t know how you hadn’t figured out that looking at yourself with gorgon vision would turn you into a monster girl. At that point, all the fail safes in the world can’t save your thicc, squirmy butt.”

Matthea flailed an arm. “Why didn’t you give me some privacy?!”

“Because it was fun!” Nagisa declared. “And I really wanted to see if you’d fall for your own reflection a third time.”

She leaned forward, fingers steepled.

“And you did. Ohhhh you did. You started growing. Bigger… and bigger… and bigger. I don’t even think you noticed at first… you were just so enraptured with yourself.”

Matthea groaned, her entire upper half flopping forward onto the nearest rooftop like a deflated parade balloon. “Please stop…”

“Only after you were too big to even see the mirror did you stop,” Nagisa added sweetly.

“Shut up!” Matthea howled. “The entire world doesn’t need to know!”

There was a long pause.

Then Nagisa nodded solemnly. “...And then you grew to this size.”

Matthea: “Okay yeah, I kinda figured.”

Nagisa sipped the last of her bubble tea through a very loud slurp.

“Oh, also! I made your boobs a bit bigger. Y’know, since you like to play with them so much.”

“FOR REAL?! I—I mean! Y-you b-bitch!”

Nagisa stood up on her shoulder like a tiny smug sorceress. “Welp, my job here is done. Any famous last words before I leave you and your harem of unintended monster girls?”

Matthea squinted. “…If I stare at myself again… What will happen?”

Nagisa’s grin turned slow and ominous.

“Only one way to find out~”

And with that, she vanished in a puff of black sparkles, laughter echoing like a smug little thunderclap.

Matthea looked around. The city lay in shambles. A kaiju medusa slithered awkwardly through cracked asphalt. Minotaurs were confusedly mooing at ATMs. A dryad was attempting to photosynthesize using a coffee shop lamp. There were at least seven slime girls holding a group hula hoop contest. And many more unfortunate victims through accidental stares, transforming even as she was just letting her eyes roam.

But somehow, with all that going on…

…all that was on Matthea’s mind was…

“Screw it. I’mma find a lake where I can see my reflection again.”