Along the forest path, there is briefly a silver hole torn in the air, out of which a blackviolet puddle of goop falls to the ground. The silver portal promptly vanishes.

The goop was once a human, who had a very bad day. Holy shit, it got shot, it died, and now it's a puddle of goop in a forest!?!?

It squirms in place in confused panic, subtle streaks of color rippling across its surface.

Sakura starts, suddenly shocked awake from her thoughts. What is this thing?

Palming a kunai just in case, she leans in to get a better look.

Whatever it is, it writhes unhappily, then rolls away from Sakura as she approaches it, glooping along the dirt.

Sable does not want to listen to those instincts telling her to lunge for the cute human with the pointy thing; she wants to take her gloopy ass somewhere quiet to process the fact that she died.

Sakura grabs for the mass of goo, chakra-boosting her muscles faster as it tries to get away.

"Ohh no, you're not getting away from me that easily!"

She grabs ahold of the slimy substance, her feeling of victory nearly distracting her as—

Oh shit, those instincts cannot be ignored when it's in contact with a human. Fuuuuuuck. 

Thick, inky goop rushes up Sakura's arms, sensitizing her skin as it covers her, flowing into every pore as it stretches higher.

Oh, kami-

Is all she can think before the ability to form coherent thoughts leaves her, chased away by the overwhelming sensation of the inky sludge pouring over her skin—into every nook, cranny and pore as it rapidly shoots up her arm, across her chest and over the rest of her body.

The inky liquid flows across her in a caress, teasing every sensitive inch of skin, pouring into her nose and mouth, flooding her pussy and ass, wrapping around her limbs. It slips in behind her eyes, pours into her lungs, rushing into every fold.

The feeling is electric, brain-melting pleasure dancing across every nerve, overwhelming her senses with bliss.

Sakura tries to scream, but with her mouth and lungs flooded with liquid, the most she can do is moan silently into the inky blackness surrounding her.

She's never felt anything like this: The electric sensation flooding through her is so much. She'd masturbated a little before, but it never felt like this—and not everywhere! She can feel the intense, erotic pleasure in her mouth, her nose, her eyes—god, she can somehow feel the liquid entering her brain.

Her body shakes and spasms at the overwhelming sensations, her pussy clenching around nothing and everything as she loses herself to the most intense orgasm of her life.

She collapses to the ground in a pool of her own fluids, as consciousness finally leaves her and she falls into the even deeper blackness of sleep.

Flowing into Sakura is the most overwhelming pleasure of Sable's entire life before dying and becoming this. It seeps into every organ and cavity, filling Sakura completely, what's left of its mind collapsing in the haze of bliss as it bonds with her.

And then it, too, is spent. Whatever it is now, it may not be able to sleep, but it can enter a kind of torpor when sufficiently worn out.

…She slowly wakes, feeling as though she'd overdone it during training for the first time in months.

…Then bolts upright! What in the six paths was that!?

She looks down at herself, looking for any trace of the strange inky creature, but finding none.

Did it leave?

No, it did not. It would consider doing so, but it apparently needs to be bonded to a human to live now, and Sakura was reckless enough to stick her hand in it when it was trying to flee and give her an option other than being bonded to it.

It died once already. Wasn't fun.

Fuck.

It speaks into her mind, voice gentle and feminine, sounding a bit wrung out with recent events, but determinedly warm in spite of that.

{Hi. Quite the tangle we're in now, ain't it?}

Their thoughts spill across each other now, the inkblot's mind just as clear to Sakura as Sakura's is to the inkblot.

What the fuck!? Is she possessed?

Wait…
"Kai!"

Damn, no. She can still feel the presence in her mind. If this is a genjutsu, it's one she's too weak to break.

...Fine.

{Uhh… hi. What are you?}

Oh wow that feels funky. She's never had a chakra system before, presumably she learned the name for the weird energy from her new host's memories? Getting a disruption pulsed through Sakura's chakra coils spills into Sable's own, intertwined as they are now, and it feels weeeiiird.

{Yeah, I'm still here despite whatever you just did. I...}

There's an ice-cold hitch in Sable's mental voice, echoing faintly with lingering mute horror, before she continues.

{I was a human. Then I died—}

{—and apparently got turned into some kind of inky goop, and got dropped into another world. Call me Sable. Pronouns are... I guess a mix of she/her and it/its. I'm some kind of symbiote, now, meant to enhance and support my host, incapable of surviving without one.}

Well that's a convenient story. No, it might be telling the truth.

Whatever she is, she doesn't seem to have hurt Sakura. If anything, the opposite—no, stop that, focus.
If she is telling the truth, that's horrible and Sakura should probably try to comfort her about it. And if it's lying, she may as well let it believe she trusts it.

{…Oh. That's a lot to deal with. I know the world is dangerous, and we have to be prepared to die anytime, but I'm sure actually experiencing it is a lot worse.}

{On the bright side, you're still alive?} No, she's clearly just been transformed against her will—that might be worse than death, and it's not a comforting reminder.

{Sorry, that probably didn't help.} What helps in this sort of situation? Distractions? Yeah, distractions.

{You said you're some kind of symbiote? That sounds interesting. I haven't met many, but I know a lot of the strongest ninja have powerful bloodlines. Maybe this is something like that?}

Oh no, she thinks she's still got private thoughts. Can't let that be, that'd be lying by omission.

{Yeah, experiencing it sucked. I definitely consider this weird goop life a bright side, though. Honestly I don't mind being what I am now, I just wish it'd come with some time to prepare myself, rather than sudden projectiles ending my previous life.}

There's a sense of a metaphorical deep breath, before Sable continues.

{Gotta correct an assumption though: neither you nor I have private thoughts anymore, so that little aside about letting me believe you trust me was very nearly as obvious as these more directed communications. Sorry.}

The moment the thought bleeds through to Sakura's mind, she winces internally. At least it'd told her - though she supposes she'd have noticed either way.

Well, assuming it's telling the truth that the thought-sharing goes both ways (and it feels like she is), it'll be really hard for either of them to lie to eachother.
That's… honestly a relief.

{Well, if you need some time to process, I think we can manage that. I'll need to be home before someone notices I'm missing, but we probably have a bit of time left before then. I can just sit quietly for a bit, if you'd like?}

{Honestly, I don't know that I'd get a lot out of quiet sitting at this point. My anxiety would just eat me. Probably I'll just have a few internal screams about being a living dead girl,} there's a faint sense of amusement to the phrasing, as though those three words are a song lyric or something back home, {interrupting my train of thought in some quiet moments. More trauma. Fun.}

It sighs harshly, then gives an impression of tired cheer. {But at least I'm alive to be traumatized about it, right? So tell me about this world, and about your village! You said there are ninja in this world? They were mostly myths and fiction back home.}

Right. She guesses that wouldn't help her much in that situation, either. Still, she feels bad that she can't do more to help.

Oh! A distraction! Her world? Sure, she can do that!

{I don't know what your world's stories about ninja were like—} Oh, now she does—that feels weird.
{—but shinobi in this world are the defenders of our hidden villages, and of our countries. I guess we also spy, steal, and occasionally surveil or assassinate our enemies, but that's probably not what I'll mostly be doing.}

{We train to use our chakra—} Oh, it doesn't know what that is? {—Our life-force—which everyone has—to perform special abilities, or ninjutsu.}

Are there any jutsu she can show Sable? Well, she had just been training her transformation jutsu, so that could work.

{Here, give me a second…}

Sakura finds a relatively-large puddle a ways down the forest path. It's been raining recently, so it doesn't take her long.

{Alright…}

Forming the hand seals, Sakura concentrates on the form she wants to take, and...

"Henge!"

In a puff of smoke, where there was once a short blonde kunoichi-in-training, now stands a slightly taller civilian girl with dark hair and a severe expression.

{I'm just a student, so I can't do anything really impressive, but I can at least manage this.} Unlike some of her classmates…

{Oooh, that's really cool! My old world didn't have chakra at all — at least not that anyone could tell — and so nothing like that was possible. I would've loved having that kind of trick, all my friends would've had to get used to me changing my hair and height and figure daily. At minimum. Not to mention the dysphoria relief it would've provided.}