NSWF-ish? Idk either.
Just, uh...there you go.
Honestly, she should've thought about it slow and carefully before jumping in the demon's mouth.
She's both unsurprised and awed at how soft Neuro's hair is. She can run her fingers through it easily, scratch the smooth scalp with only making part of her fingers disappear, and the brush passes just as smoothly. Neuro's hair seems to shiver at the touch, and it only makes her want to run her fingers through it all the more. The soft strands aren't as thick as she thought, and make a faint smell of ozone drift into the air with every touch. It makes her slightly dizzy, but she's grown accustomed to gases that would probably kill any other human in minutes thanks to all the years of being second-hand exposed to miasma. And the smell is... actually nice, somehow, something that makes her think of planes and Neuro's return. Nice thoughts, pleasant ones, that make her own hair unknowingly mirror Neuro's in color. She closes her eyes, biting down a sigh of contentment.
Her nails scratch the scalp again, making the strands of hair curl around her wrist, and she takes it away, wanting to pull back the dark strands that fall over his face so she can brush them too, but her hand knocks against something hard and rough to the touch. She opens her eyes in surprise.
In front of her, a pair of horns rest over the back of a humanoid head, and the view of Neuro's...facial structure? Bone structure? from behind is actually quite interesting, if weird. Like the freakish red claw-like hands that Yako knows aren't the ones he naturally reverts to in human form weird (she's seen his human hands. Freakish nails? Yes. Red and pointy and dangerous looking? No).
Neuro, on his part, either isn't aware or doesn't care, so Yako keeps brushing the back of his hair, trying to avoid the horns. But they are there, and she ends up accidentally brushing them, despite her best efforts.
The effect is instantaneous.
Neuro tenses, a shiver traveling his whole body, and a croaking noise that sounds too much like a bird's comes out of his beak. Yako doesn't know what possesses her to do it again, but the sounds he makes are encouraging enough, so she doesn't stop, and instead goes to brush his hair with a hand while she strokes the horns with the other, alternating between one and the other. Neuro's choked bird noises keep getting louder, and her own cheeks flush as her heartbeat speeds up and Neuro's hair tangles in her hands and wrists and seems to hold on for dear life.
With a last cry, Neuro tenses and then his whole frame slumps, hair resting lax around Yako's hands. She disentangles the limp strands from her fingers, brushes them until they're neatly placed (and a small shiver of bliss goes through them every time the bristles touch the strands) and avoids the horns, her mind slowly catching up on what the fuck just happened.
There's not much time to do so though, because the moment she puts away the brush a hand grasps her wrist and throws her forward. She falls on the sofa, on Neuro, and she's frantically trying to think of ways of escaping the demon's wrath (and ticking out things where to hide behind when he starts to throw pointy objects) when something wet and squishy hits her head, not hard enough to actually hurt, and moves up on a straight line, to disappear and hit her head again. Yako realizes with growing horror that Neuro is licking her head, but the pain of corrosive saliva eating through her flesh and skull never comes. Instead, Neuro keeps doing that, his beak pulling on her hair every once in a while, and Yako realizes that he's actually undoing the unholy buns and straightening her hair. His arms, which she wasn't even aware had surrounded her frame, hold her still and unable to escape. Neuro chirps happily.
And that's the moment she remembers the trip to the zoo in seventh grade, and the cage full of birds they'd fawned over. She remembers the monitor's voice explaining to her that no, those parrots weren't trying to pluck the other's feathers off and eat each other and then explaining to her classmates that no, they weren't kissing each other, either, not exactly. It's better than that.
And suddenly everything that's been happening those last weeks makes sense, in that stupid, painful way that comes with "things that seem obvious in hindsight".
This realization is quickly eclipsed by the one that she's been dating Neuro for weeks.
Her mother will probably be monstrously upset that she didn't tell her before. And that will mean inviting said boyfriend to a family dinner.
She internally groans, as Neuro preens her hair and holds her.
(Later, she'll realize he's shaped her hair to look like a dead cockroach. People avoid her on the streets all the way back home.)
EDIT: Now with a sequel! :D