Work Text:
It’s easy, sometimes, to forget that Yuuji is human. She punches through concrete walls with ease, rips curses limb from limb, and can throw cars across the street like they weigh nothing. Some days, she seems more curse than human, although it’s hard to tell where the lines between her curse and human ancestry lie, or what parts the parasite inside of her has changed.
But at the end of the day, she is human, and Choso is not. He tends to ignore some of the things that she considers necessary—forgoing finding a place to rest for the night, deciding not to build a fire when the wind whips through extra-chilly, passing over the few convenience stores they haven’t already ransacked for food and potable water. And, in most cases, it’s not a big deal. Yuuji can speak up for herself if she needs to. When she does, Choso is always kind, and occasionally over apologeticoverapologetic when he hears her stomach rumble or helps her hunt down shelter.
This is different, though. For whatever reason, the thought of asking Choso to pause their trek through the ruins of downtown Tokyo so she can squat in an alley makes her cringe.
She’ll just wait until they stop for the night, and then she can dart off somewhere away from his prying eyes. It’s not like the utilities in Shibuya are still working, so she’s mostly been making do with desecrating the few public restrooms that haven’t been smashed into bits yet, and that option clearly isn’t going to last forever.
Yuuji squeezes her thighs together as they walk, and hopes that Choso will stop sooner rather than later.
They round the corner of a half-demolished building, and Yuuji, caught up in the distracting sensation of her aching bladder, notices the swell of cursed energy too late. The curse—an eyeless, sickly-look thing, with flat teeth and spindly legs—launches itself at her, knocking her down against the hard concrete.
“Yuuji!” Choso shouts, panic evident in his voice. “Hang on!”
Yuuji punches the curse off of her, tries to scoot away from it, but it grabs her by the neck and slams her against the wall of the alley. She gasps as her head cracks against the brick, and tries to summon her cursed energy, focusing as hard as she can—but she feels herself leak, a trickle of piss that dampens her underwear, and the blue flame fizzles out around her fist.
The curse leers, mouth opening wide to reveal a secondary jaw that chitters as it extends towards her.
Yuuji grits her teeth. She literally came back from the dead; she’s not going out pinned against a wall about to piss herself.
Ribbons of blood slice through the curse like knives, and its body flakes away almost instantaneously. Yuuji slumps against the wall, panting, and jams a hand between her legs.
“Yuuji, are you all right?” Choso asks, hovering in front of her. “Are you…hurt?”
“I’m fine,” Yuuji bites out. “Go away!” The adrenaline from the brief fight, combined with her being thrown around carelessly, made the pain in her belly spike, turning the distracting ache into something sharp and throbbing.
“You’re practically hunched over,” Choso says. “You look sick, are you sure you’re okay?”
Yuuji…is pretty sure she’s going to wet herself if she moves. Actually, she’s pretty sure she’s going to wet herself even if she doesn’t move. Her hand is the only thing keeping her panties dry at the moment.
She really, truly doesn’t want to admit it, she at least owes Choso an explanation. “I really have to pee,” she admits, blinking away the tears welling in her eyes. “I…I don’t think I can make it until we find a bathroom.”
Choso’s face softens. “Oh, Yuuji,” he sighs. “I’m so sorry. I forgot. You should have said something. Do you want me to turn around?”
Like that would make a difference, when he could still hear her go. Yuuji bites her lip and shakes her head no. “No, I mean…I don’t think I can even get my skirt down. I’ll lose control if I move my hand.”
Choso looks down at her hand, pressed into her crotch, squeezed between her thighs. “Would it help if I…” he starts, and then slides his fingers underneath the hem of her skirt until he’s cupping her hand, pressing upwards. “Here. Now you can pull your skirt up over your hips, and pee without it getting dirty.”
Yuuji squeaks at the sensation of his hand on her inner thighs. He runs hot, and the warmth of him resting against her crotch makes it harder to hold.“N-nii-san—“
“You won’t be able to pull your panties down in time, right?” Choso murmurs. “So pull your skirt out of the way, and then go. Your underwear will dry out. It’s okay.”
“N-no—I can’t—“ Yuuji stammers.
“Do you need me to pull your skirt up for you?” he asks.
“No!” Yuuji cries out, cheeks burning. It’s embarrassing enough that she had to tell Choso how badly she needed to go in the first place, but now he’s helping her hold it? Pulling up her skirt? He’d probably even wipe for her if she asked him to.
“Go ahead, then.”
Yuuji swallows and slides her hand out of its space between her thighs. Immediately, Choso’s hand slides up even further, cupping her sex. His hand is warmer than hers, his fingers bigger, and she makes a little noise in the back of her throat at the sensation. With shaky hands, she reaches to her sides and pulls her skirt up, inch by tantalizing inch until it’s above her hips.
What a sight she makes now, huh? Almost naked from the waist down, pressed against a brick wall in a dirty alleyway with her brother’s hand pressed into her crotch. God, he can probably feel the wet patch from when she leaked earlier.
“Good girl,” Choso murmurs. “Go ahead. Let go.”
“Y-you’re not gonna—move your hand?” Yuuji asks, resolutely not whimpering.
“I wasn’t planning on it,” Choso replies. “I want to feel you let go, Yuuji. I want to hold you as you get your relief. I want you to get your scent on me, so I know you’re with me always.”
“That’s kind of weird,” Yuuji says, half-laughing. She might be a little hysterical.
Choso shifts his fingers a little, nudging against her clit as he does so. “Is it weird to want to know all of you?”
“I mean—“ Yuuji starts, and then cuts herself off. This time, she notices the nauseating pulse of cursed energy right away: a curse, with skin like oil and dull red eyes, lurks at the entrance of the alleyway, its gaze fixed on her and Choso. “Choso-nii! Look!”
“I see it,” Choso says calmly.
“Aren’t you going to fight it?”
“You’re more important,” he responds. “You need me more.”
“I need you to take care of that curse—“
“Yuuji,” Choso interrupts. “Let go.”
Yuuji doesn’t know if it’s Choso’s voice, cool and commanding, or if her body simply reached its limit, or both—but she gives in. She starts peeing, just a trickle at first then gaining in speed, the hot liquid flowing over Choso’s fingers and running down her legs.
The relief is fantastic, but she can’t quite hold back a sob of humiliation at the sound of her piss splattering on the ground below her. Her thighs get slick and shiny, the crotch of her panties gets warm and soggy. She feels so gross. It’s even dripping into her socks.
“N-nii-san—” she chokes out.
“Shh, Yuuji, shh,” Choso murmurs comfortingly. “Good girl. It’s okay. You’re doing so well.”
If ‘doing well’ means ‘uncontrollably wetting yourself in a dingy alley in front of a curse,’ then yeah, Yuuji supposed she’s doing pretty damn great. She wrenches her eyes open—when did she close them?—to see Choso’s gaze fixed on where his hand is pressed against her crotch, staring at the dark stain slowly growing on her pink panties. “So good for me, Yuuji, perfect girl,” Choso keeps mumbling. Yuuji doesn’t know if he’s even aware he’s doing it.
The curse takes a lurching step forwards, and Yuuji’s heart skips a beat. So does her bladder, and her stream gushes forth even faster, splattering over Choso’s palm. He continues to gaze at her in adoration (and, judging by the way his curse mark has gone all gooey, lust).
“Choso, come on,” she begs. “It’s getting closer!”
“You’re more important,” he replies, still not looking away.
Yuuji decides, in this moment, that Choso’s priorities are fucked.
As her stream trickles off and the curse stalks closer, she pushes Choso away and turns to face it. This time, her cursed energy comes easily, and she dispatches the curse with a single punch. Serves it right for creeping on her.
When she turns back, Choso’s eyes are where her ass was, and he jerks his gaze up guiltily. Yuuji flushes and tugs her skirt back down. The wet patch in her underwear is already going cold, and her legs are uncomfortably sticky. Plus, she’s sure she smells even grosser now. They’ll definitely have to stop somewhere with a bath tonight. She’ll have to be careful not to let Choso touch her with that hand, either.
“It's nothing to be embarrassed about, Yuuji,” Choso says. “I’ll be sure to pay more attention to your bodily needs in the future. And thank you, also, for letting me provide my assistance.”
Yuuji’s face burns. “Whatever!” she says. “Just—don’t mention it, okay?” She turns and stalks out of the alley, in search of more curses and a decent place to spend the night.
Where Yuuji goes, Choso follows. They leave nothing behind but curse remnants and a rather large puddle.