kinktober ; day two, jerking off instructions ❤︎ mist/rain
contains: rain's personified tentacle (she's a she), new summon rain, mist showing rain the wonders of sentient genitalia
approx. 1140 words. ghostober list compiled by @kroas-adtam !!
Mist’s breath is hot against Rain’s ear, her hand cool where she’s positioned it over his, guiding his fingers as they ghost over the length of his tentacle. They’d spent so long trying to coax it out of its sheath together that they’d both laughed in disbelief when they finally managed it.
“She’s shy,” Mist murmurs. “Bit like you, tadpole…”
“‘M not shy,” Rain protests, breath hitching as Mist guides his hand to wrap around his tentacle. He also didn’t miss the way she referred to his tentacle as a she. He thinks he likes it. “Just… quiet.”
Mist hums in agreement. “Always the quiet ones,” she says quietly, almost to herself. Rain’s not entirely sure what she means by that, but he can hear the smirk in her voice as she speaks. He gasps as the water ghoulette curls their fingers tighter over his tentacle, moaning softly as he tilts his head down to watch as the tip wriggles and squirms under their touch.
“F– fuck…”
“Nice, right?” She leans forward just enough to attach her lips to his neck, kissing gently over the gills fluttering there and moving slowly down the length of it.
Rain nods quickly. “Uh huh. It’s… different?”
He feels her grin against the bare skin of his shoulder. “Not a bad different, I hope.”
“No!” Rain is quick to defend himself. “It’s good. Really good. Promise.”
The water ghoulette throws her head back and laughs, jerking their conjoined hands tighter around Rain’s tentacle and pulling a soft moan out of him. “You’re not in trouble, little siren, it’s alright.”
Rain huffs a sigh of relief.
“Although,” Mist starts up again. “I do think it’s time you learnt to handle her on your own.”
“I– What?” That’s new. He can’t tell whether Mist is personifying his tentacle for an actual reason or whether she’s just trying to rile him up. Whatever the reason, he kind of likes it.
Mist takes her hand off of Rain’s, rubbing his arm comfortingly with her now-free hand. “You can do it, tadpole. I’ll guide you, tell you what to do. I Promise.”
Rain breathes in shakily and nods, flexing his now lone hand over that unfamiliar part of himself. It’s silly to be nervous, he knows. It’s not like he’s never jerked off or fucked anyone before, it’s just that this and all its weird anatomy is an entirely new concept to him. He hadn’t even known he could do this until Mist had cornered him this morning, promising to show him a good time if he’d let her. He can’t deny that he’s having a good time—he’s loving all of this—it’s just different. She is just different.
Right now, she is wriggling in his grasp, writhing in strange, almost hypnotising patterns as she chases her own pleasure. Maybe this is why Mist calls her her own separate entity, it really does feel as if she’s got a mind of her own, focussed on her own whims with no regard for how her actions make Rain feel. Luckily, every movement of hers sends shudders through him, as if every sensation is magnified now he’s no longer in control.
“She likes you,” Mist breathes, making Rain startle. He’d half forgotten she was here, sitting behind him.
He laughs breathlessly, chuckles hitching on gasps as he sets nerves alight all throughout himself. “I’d hope so, she’s a part of me.”
“Mmm,” Mist agrees. “But better to have her like you than hate you.” She coos down at the tentacle, reaching down to run a finger along its length. Rain gasps as his hips buck up into her touch involuntarily. “She wants to see you cum, tadpole… You gonna give her what she wants?”
Rain nods helplessly. “Uh huh, wanna help her. Wanna cum,” he mumbles, squeezing his eyes shut as his tentacle rubs herself more erratically against his hand. Somehow he knows that she’s urging him to squeeze tighter, to move his hand over her. “Oh fuck,” he whines as he does exactly that, rhythmically squeezing his hand around her as he slides it up and down.
Now that he’s moving his hand, he realises that she’s self-lubricating and he cracks an eyelid to glance down at her length, now shining with slick. At that sight alone, his hand speeds up, pressure building low down in his gut as he does so. It’s a bizarre sensation, as if he’s jerking off someone else but feeling it in his own body. Briefly, he wonders whether this is what Aether and Aeon brag about being able to do, but that thought—and indeed all others—is wrenched from his mind as his tentacle goes ramrod stiff in his hand.
“Mist, I–”
“Keep going, Rain,” she murmurs against the shell of his ear. “It means she’s close.”
He nods, letting his hand fly as fast as it can over… her? Himself? Whatever. Vaguely he notices his arm is cramping but he doesn’t care, how could he, when he’s feeling everything else with such wonderful intensity? “Mist I think I– I think she’s gonna–”
“Fuck, that’s it tadpole.” She runs gentle fingers over the gills on his ribs as he speaks, sending shockwaves straight to his cunt and straight to her. “Make her cum for me.”
And really, that’s all it takes. At Mist’s murmured demand, Rain’s hand speeds its movements, droplets of slick practically flying off of his tentacle as he works her over the edge. His legs jerk as his muscles spasm, everything except pleasure gone from his mind as he makes both himself and the tentacle cum. She paints his belly in streaks of inky blue fluid as he cries out desperately and squeezes his eyes shut yet again against the onslaught of pleasure he’s experiencing. It’s like a dual orgasm, as if the both of them are separate entities rather than the one singular organism, and Rain truly does not know how to handle it.
He slumps back against Mist as he comes down from what might have been the best orgasm of his entire life, both Topside and in the Pit.
The water ghoulette’s chest rumbles as she laughs softly, bringing a hand to his head to stroke his hair gently. “You have fun, tadpole?”
“Mhmm,” he mumbles, too fucked out for real words just yet. She hums. “Good.” Her hands scratching against his scalp feel so nice, he could honestly fall asleep right here. As comfortable as he is though, there’s something pressing against the small of his back, something wriggling, and– oh. “I hope you can recover from this quickly, Rainy,” because if you thought she was good for you now…” He can hear the grin reflected in her words. “Fuck, just wait until you see what it can feel like when she has the chance to play with a friend…”