[CONTENT WARNING: NSFW, Slimeification via melting, lewds. You've been warned]

“This is so, ridiculously, incredibly boring.” Izanami grumbled. “You have phenomenal cosmic power. You could rule this city if you had a bit more common sense and willingness to work with me. You could even be running around finding and blasting villains to bits, if that’s your cup of tea. And what do you do?”

“Go hiking, obviously!” Hikari said cheerfully, carefully picking her way through a disused trail.

It had been some time since Hikari and Izanami had accidentally been stuck in the same body, in an event they both thought of as “the incident”. There had been some back-and-forth power struggling for some time, and that had caused some major issues, until eventually, they came to an agreement. They’d take turns in control of Hikari’s body - Hikari kinda felt bad for accidentally nuking Izanami’s original one anyway, and if they changed back and forth each hour it’d be impossible for either of them to get anything done.

“And you go on a hike.” Izanami said with a sigh.

“It’s my turn in the driver’s seat, and I’ve been looking forward to this trip for weeks.” Hikari said, humming to herself. Matsushita city, being the man-made island that it was, didn’t have all that much in the way of nature normally. But it’s founder, eccentric as he was, had wanted to have somewhere he could go hunting or even just have a nice picnic - and thus, one of the segments of the island was dedicated to a large manufactured woodlands region, complete with flora and fauna and varied terrain. It was a favorite spot of hers, and her family and Natsuki’s made a point of going out to it once a year. Izanami might not like it, but she could do with a bit of a break from villainy in Hikari’s unbiased opinion.

Hikari had gone wandering off away from the campsite on her own to get her dose of nature. Natsuki had apologized to her friend and her mistress for not following but she had to help her mother with the tent, Miss Nakano was hopeless with the great outdoors but too stubborn to get help outside of the family, but honestly, Hikari didn’t mind - this way she could hear the birds sing, the babbling brooks, the whisper of the wind through the trees, the giggling - wait, giggling?

That was not normal. She’d been down this trail more than once, and not once had there been giggling except from her. She followed the noise, off of the trail. “Wonder what it is? Maybe some kids are playing around?”

“Knowing your luck and common sense… probably not.” Izanami muttered, at least so far as someone inside of your head could mutter. Hikari always figured she was way too negative. Sure, she was right a surprising amount of the time, but she could stand to be nicer about it.

The foliage was a bit dense, but the giggling got louder and eventually Hikari could see the source. In a small clearing, there was a pool of bright purple liquid. It looked like water at first glance besides the color… but something was weird about the way it moved. And there was a strange smell in the air, that she couldn’t quite place. The giggling was louder now, even though there wasn’t anyone who looked like they could be. “Hello?” Hikari called out.

The giggling stopped abruptly. For a few moments, there was silence. “That doesn’t seem good.” Izanami noted. “Maybe you should transform and blast it? You blast everything else…”

“Oh shush you.” Hikari said with a pout. She wasn’t that careless, incident with Izanami’s body aside. She did rummage through her clothes for her amulet though, just in case she had to transform in a hurry.

The purple liquid bubbled and gurgled… and moved. Shapes started to form out of the liquid. Translucent purple women, with little bubbles of air still floating around inside them. “Ooooh~ A visitor~” a few of them said at once. There were a lot of them, like the whole pond had just stood up to greet her.

“And a cutie at that~!” Another trio of women said. “Welcome to our lovely home, human~ Do you want to come and play with the slimes~?”

“We’re very nice~!” Another purple woman - slimegirl? - said. “We loooove having new friends to play with, to hug tight~”

“Hikari, now’s a good time to transform…” Izanami said. If she hadn’t just recently used up the last of her magical power the last time she was in control, she’d seize right then, but as it was she had to hope the idiot moved.

Hikari took a deep breath. A deep breath of that… strange smell. It kind of reminded her of those sake bottles her parents kept for special occasions. And instead of tensing, she relaxed. “Izanami, you’re such a pessimist. Why should I blow them up? They’re not hurting anyone.”

The slimes smiled and giggled in unison. “Yeah, we’re just nice girls who want to have fun~ Whoever you’re talking to is a meanie!” one said.

“Why don’t you take off those frumpy clothes and join us?” Another queried, an excited glint in her eye (such as it was, given the slimy nature it was hard to tell). “It’ll be the most fun you’ve ever had.”

Warning bells were going off in Hikari’s head, and only some of them were Izanami telling her to leave. Something was wrong here. But… well, that seemed harmless, and she figured she’d like to go for a swim. The little haze in her head didn’t seem that important. She heard Izanami groan loudly in that way she reserved for when she was particularly annoyed, but honestly, Izanami’s annoyance wasn’t a stand out factor in her decision making.

Hikari smiled and decided she’d be friendly. It always worked for her before! Except when it didn’t. But that was besides the point. “Give me a second~” she said, glad she’d brought her bathing suit and had decided to wear it - they’d planned to take a dip in a lake later. A few moments later, she was toeing into the slime pool to the cheers of its denizens.

It was a pleasant temperature - not too cold, and just hot enough to help relax. Her worries continued to fade as the slimes  helped her in - she didn’t even have to swim as she was pulled to the middle of the small pond, Izanami shouting in her ear.

At first, Hikari felt quite vindicated that the slimes seemed as nice as she’d thought they would be. They squeezed around her, feeling like a warm hug from a best friend. The little bits she got in her mouth actually felt kinda nice, although she admittedly wasn’t sure if they were ok to get in there - a worry which soon faded. Izanami had given up on her yammering, sighing and doing the headspace equivalent of sitting down with her head in her hands in exasperation. Hikari stretched out, giggling softly - the way the slimegirls bodies lapped at hers was a little tingly.

But then, things started to change. Her body, initially floating atop the slime pool, was pulled slowly, gently, deeper, until just her head was above the slime. “Ehehe, what’re you doing guys~” she muttered, the intoxicating smell of the slime a dozen times thicker here then on the shore. It was hard to think through the haze.

One of the slimegirl’s heads popped up next to Hikari’s again, a lecherous grin on her face. “Don’t you worry, cutie~ We’re just being very, very friendly~” she said… at about the same time Hikari felt something sliiide past her swimsuit bottom, and into the region beneath. “Veeery friendly~” the slimegirl repeated… as the slime slid it’s way into the magical girl’s pussy.

All at once, it wasn’t friendly hugs anymore. No, now it was an amorous, erotic embrace - it didn’t just stop at her vagina, the slime squeezed tightly around her bust and bottom, and as she opened her mouth to… she didn’t even know, complain? Moan? The slimegirl that had peeked out lunged in and gave her a kiss, sending even more slime into her mouth and down her throat. Hikari was blindsided by pleasure from every avenue, and couldn’t do anything but shake and shudder and take it. Her lower lips were spread wide as the slime explored down below, an alternating current of flood and trickle forcing her apart again and again. At the same time her bust was embraced, squeezed, groped, her nipples pinched and sucked, while her ass was squeezed and jiggled.

“H-Hikari?” Izanami started - she would be blushing if she could. She felt every bit of what Hikari did if she didn’t do her best to shut herself off - and even now, she was getting quite a lot of the same pleasure. “Come on, transform, you need to get us out of here!”

“A-Ah~ Aaaaaaahn~!” Hikari’s only response was to moan loudly, muffled by the slime thrusting into her mouth. She had been completely blindsided by the sudden, vigorous fuck the slimegirlls were giving her, and combined with the alcoholic haze of their smell she was reduced to a moaning wreck. She barely even heard Izanami behind it all.

“Ehehehe~” The slimegirl giggled, “Mistress will like you~ Just give innn to the pleasure~” she sing-songed as Hikari’s head was pulled into the slime. She was completely submerged now, the onslaught of pleasure impossible to think through as the slime filled her more and more. It was in her lungs, her gut, in her very bloodstream… and it was getting into her head. The slime moved through her body, filtering through the bloodvessels until it was being pumped around by her own heart, slipping into everywhere it could reach… including her cranium. “Don’t worry~ Melting is the greatest pleasure a human can experience, for sure~!” the slime giggled, it’s words whispered right in Hikari’s ear from everywhere at once. And then it began.

Hikari was long past the capacity for conscious thought, but Izanami was panicking as she felt the slime begin to eat away at their minds. It was everywhere, it was getting everything - she tried to find deeper and deeper recesses in Hikari’s brain, but it followed her, there was nowhere to hide as it started to bubble and fizz and - Izanami felt it getting at her, and Hikari did too, melting and mixing. She had to get out she had so much villainy-no heroism- left to do, a villain-heroine like her couldn’t go like this - wait, who was even the one thinking…?

With an audible glop sound, Hikari’s brain melted to slime. For a moment, there was no thought. In the goop that had once been a brain, two minds mingled and merged. It was impossible to tell where Hikari ended and Izanami began, and it wouldn’t be a useful distinction anyway. Hikari and Izanami weren’t separate anymore, but one mind.

Hikari - no, Izanami - Hikarinami? Izari. Izari thought her first thoughts. They were, in order, “What happened to me!? Where am I!? I’ve got to go and get out of - oh fuuuuuuuck~”. The mixed mind, new to this world, had some of Izanami’s remaining resistance in it. That part had tried to formulate a plan - and then had instantly been drowned in orgasmic pleasure, as the body that had once been Hikari’s seized up and came hard.

The slime had thoroughly suffused the girl’s body, and the brain was just the first part to go as she was turned to slime from the inside outwards. The purple goop in Izari’s blood went to work, melting and dissolving whatever wasn’t needed - and given what she was becoming, that was just about everything. Her organs were dissolved, not that she needed them anymore. As Izari writhed with the overwhelming, mind-breaking pleasure of transformation, she stopped being able to move - the slime had moved on to her bones, melting those away as well. The body was having trouble keeping it’s shape now that the skeleton was purple goop, but that soon ceased to be an issue, as the outer flesh jellified and turned to yet more of the substance. Hikari’s swim suit floated to the surface, all that remained of it’s occupant a mass of incredibly pleasured sludge.

For a while, Izari had no idea how long, she was nothing but mindless, unthinking pleasure - just material mixed in with the slime, and that had been fine with it’s thoughtless self. But soon, a whisper in it’s barely-there consciousness. A command, incomprehensible but at the same time innately understood. Form. Take shape. Be mine. Izari’s first words since it’s - since her creation were uttered in a thousand different places as the slime that her body had been melted into began to coalesce. “Yes, Mistress~”

Izari slowly, almost reluctantly, pulled herself into a vague semblance of solidity, and stepped out of the pool with a goodbye pleasure-shock to her purple sisters. The pile of goop dragged itself out of the pool, and quickly formed into the shape of a kneeling woman. Izari resembled Hikari in many ways, but the slime-woman had rather nicer assets, along with being translucent, purple slime - purple slime with swirls of red, oddly enough, marking her as different from her sisters.

She looked up, seeing the pure red slime of her beloved Queen, her Mistress, her Mother. The slime-woman was tall, with a matronly figure and a loving, lustful expression. “Dear Izari~” she crooned, “Welcome to the family~” She presented herself, and Izari knew exactly what to do - she leaned in, and started to lick. As she lapped at her Mistress, the woman spoke to her - her former self had had friends, hadn’t she? Wouldn’t they be so happy to join~? It was so much fun letting her servants turn on their former lives than to do it herself~

-----------------

“Hikaaaari! Mistresss! Are you out here?” Natsuki called for what must have been the tenth time. She’d been asked to go looking around for Hikari and by extension Izanami - she was late coming back, so she might have gotten lost! Or maybe she had run into a monster or something, Hikari was a magnet for trouble. Either seemed equally likely for her admittedly lacking common sense friend, despite Hikari’s natural sense of direction.

She was looking for something like half an hour, when she found some beaten down brush that looked like someone had passed. Either a big animal, or Hikari barging through. She followed the tracks until she heard a snapping behind her, and then a giggle. “Hikari-” she started, as she turned and was blindsided by the sight.

A translucent purple-and-red woman, buck naked and with an impressive figure, was standing right behind her, giggling at her. She had a big smile on her face - a face that looked a lot like Hikari’s. Natsuki wasn’t as… well, dense, as Hikari could be sometimes, and put two and two together pretty quick. “There you are!” she said cheerfully, “I see you got got again~ Is it Hikari or Izanami in control? Gotta know if I’m crying out for my bff or my mistress!”

The slime blinked, but smiled even wider. “Who? I’m Izari, not either of them. You look familiar. Wanna be friends? Because I wanna be friends with you, ideally right now.”

Natsuki gasped and clapped her hands together. “Ooooh, ooh! Fusion! That’s always great~ I get both my best friend and my mistress transforming me at the same time!” Izari was obviously a bit confused - she probably wasn’t prepared for a victim who wanted to befriend her and knew what that entailed. Natsuki pressed close, shivering with pleasure as she felt the slime press into her and got a whiff of her smell. “Well, I’m waiting for it~ Melt the humanity right out of me~”

Izari grinned broadly, and licked her lips. “Oh, it’s lovely that you know what your proper place is~ You’ll be my best friend I think~” she trilled. She returned the press, close enough that Natsuki was actually partly inside of her. “You’ll serve your new Queen well~ Ooooh, it feels nice to call myself that, I can’t wait to be one for real~”

Izari wasted no more time, leaning in and giving Natsuki a deep kiss. For a while, they just made out like that - but soon, it was time to progress things. Pulling her deeper, Izari held tight as she suddenly began to flood Natsuki’s mouth with slime. The girl was eagerly drinking it in, throat working hard to swallow as much as she could, knowing exactly what it was for and unable to wait.

The slime woman didn’t break the kiss as she set her slime to work, the part of herself that was inside of Natsuki getting to work dissolving and melting parts of her. Natsuki slumped with an overly pleased, lewd grin on her face as her brain was melted down - she needed none of that pesky humanity anymore, and eagerly embraced slimehood as the rest of her rapidly melted to catch up with her brain.

Izari followed Natsuki to the ground, maintaining the kiss as Natsuki lost her solidity, and finally melted into purple sludge. Giggling, Izari allowed her form to dissolve as well, mixing together with Natsuki in a puddle of slime as she worked over her mind and built her new best friend.

Soon, the two masses of slime separated, and reformed into their respective shapes. Izari was slightly bigger than she had been, her bust larger and hips wider, along with a lot more red. Natsuki, meanwhile, giggled softly as she formed in the pure purple of a lesser slime.

“Hnnn~ My Queeeeen~” Natsuki the slime moaned, still feeling the pleasure of her creation. “I’m yours to do with as you please~ Do we go get the silly girl who says she’s the queen and not you? Or should we get more annoying humans first? I like both options a lot~”

Izari smiled. “We can do whatever we want… and right now, I want you on your knees in front of me~”