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2025-07-29
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Hinako's Dirty Secret

Summary:

Hinako and Himeko are close enough with each other to talk about their bathroom habits. Himeko has heard that Mana and Miu, two girls who go to their school, are sneaking off to use the bathroom together for something extremely naughty, and thinks that doing so might provide a better place for Hinako to go than in her panties.

Notes:

Shameless perverts of the world, unite!

Mana and Miu are featured in Namiroji's stories "Anata to Nara... Ii yo" and "Onaka Ippai no Ai", while Hinako was introduced in the sixth chapter of Haisetsu Shoujo and became one of the author's favorites.

Work Text:

Hinako’s overactive bowels were something she had gotten used to. She hated that, no matter what she ate, she found herself having to poop with a great frequency, far more often than anyone in her class. Because of that, she had gotten used to pooping at school, as well as several public toilets and even outdoors. The amount of time she had spent in the bathroom each day was small, but it added up over time. She wondered if there was something else she could do. It was during a free study period in class when Himeko, her friend and classmate, pulled her desk up to Hinako and spoke to her in a whisper, making sure that their conversation didn’t leave the space between the two of them.

“You’re bloated,” said Himeko, looking down. Hinako desperately needed to poop again, and her stomach was sticking out the bottom of her uniform. Himeko drawing her attention to it, something that Hinako had been desperate to avoid, made her squeak out a fart behind her desk. The smell was intensely strong, reaching Himeko’s nose. Hinako blushed in embarrassment, but Himeko found it endearing. She didn’t have many friends she could talk to about personal issues.

“It’s been pushing against my stomach for hours,” Hinako said. “I’m trying to hold it in, but it keeps turtle-heading.”

“Mine feels like it doesn’t want to come out,” said Himeko. She released a deeper fart. The smell wasn’t as strong. Hinako’s overpowered hers, though a few of their classmates turned their head when Himeko tried to discreetly rip one. “I think I’ve found a solution to both of our problems. It’s a risky idea, so I don’t know if you’d want to try it.”

“I’ll try anything!” Hinako said.

“I was talking to Miu. You know how she and Mana always sneak off together when they need to use the bathroom?” asked Himeko. Hinako had noticed the two of them going to the bathroom together more than friends usually would. They had been coy about answering the question, but Himeko asked Miu the question directly. She wanted to know what was going on between the two of them. The answer surprised her. “They’ve been eating each other’s poop.”

“Eating... poop?” asked Hinako. “I always want to flush it as soon as I’m done. Why are they doing that?”

“Miu says that because it’s Mana’s, it tastes good,” Himeko said. “You’re producing so much every day, I’d be glad to help you get rid of it.”

“Does that mean you want me to eat yours too?” Hinako asked.

“Yes,” Himeko said. “You’re thinking about poop all the time. Haven’t you thought about tasting it? Even once?”

“Maybe... but I’ll need some time to think about it,” said Hinako.

When the last classes of the day were over, Hinako and Himeko walked to one of Hinako’s favorite public bathrooms. It was located on the way home from school, making it easy to duck into one of the stalls for a moment. The stalls had Japanese-style squat toilets, a favorite of Hinako’s. Hinako was clenching her butthole, trying to hold in her shit before she arrived. If she took a dump in her panties, there would be no point to their perverted little experiment. Himeko had less shame, and kept unleashing farts the moment they left the school gate.

Himeko’s farts came from deeper in her ass with each step. Hinako could smell them, and their rank stench made her want to poop. They turned a corner into the toilets, and set their skirts and tops hanging over the door. In the confined space of the bathroom stall, their farts echoed off the walls, reverberating back to their ears louder and riper than ever. Hinako hurriedly took off her panties. A small and growing brown spot had already formed at the back of her underwear. She pulled it off, the fabric moving around the turd but not clipping it off. Hinako’s turd hung between her plump butt cheeks, swinging back and forth.

“It’s already coming out...” Hinako said.

“I wanted to wait a while longer before eating,” said Himeko. Her stomach growled. Hinako held onto the railing on the side of the bathroom stall, sticking her butt out forward and squatting down. Himeko opened her lips, and wrapped them around the dangling end of Hinako’s turd. Her tongue was assaulted with a strong and bitter taste, and a cakelike texture. She sucked on the end of her hard shit, coating it in a layer of her saliva. Her mouth quickly filled up with the large amount of poop overflowing from Hinako’s butt. She chomped on the end of the turd, biting it off and taking it into her mouth.

Hinako looked down at her friend chewing on her turd. The taste grew stronger. Himeko swallowed the mass of clumpy brown shit in her mouth, and asked Hinako for more. Hinako groaned. Squeaky farts escaped the gaps between her shit and her asshole. The smell was so strong that if someone stepped into the bathroom, they would notice it on the spot. The last of her turd came out of her ass. It slid across HImeko’s tongue, with the end of it hanging out of her lips. Himeko chewed it into smaller pieces, savoring the remnants of Hinako’s lunch that had gotten mixed in with her shit. She swallowed what Hinako had released, and saw the beginning of another log emerging from her ass.

The next log that came out was softer and slimier than the first. It filled Himeko’s cheeks. Hinako saw the sides of her turd turning her friend’s cheeks brown. She couldn’t stop her overflowing shit. Hinako was relieved that she had only slightly soiled her panties, but she wondered if Himeko was truly willing to take everything her ass could produce. The log coiled into her mouth, going down her throat with loud gulps. A clumpy piece of her shit broke off from the log, landing on the upper curves of Himeko’s chest with a wet plop. Himeko picked it up between her fingers and swallowed it along with the rest. A wet fart left Hinako’s ass, signaling the end of her extended defecation.

“How did it taste?” Hinako asked.

“It was awful, but the more I ate it, the more I came to love it,” Himeko said. “I want to try drinking your pee too.”

“Can’t I just go in the toilet?” Hinako asked.

“You look like you’re about to spray it against the wall,” said Himeko. “I know your pee will be even more delicious.”

Hinako turned around. The swelling in her belly had gone down. She faced Himeko and spread her legs. Hinako’s pussy was dripping and her her clit was rock hard. Pushing out a turd that huge had turned her on, and driven her to a small but repeated series of orgasms. Himeko positioned her mouth between Hinako’s legs and opened wide. Her mouth was right below Hinako’s urethra, and the shaking in Hinako’s legs told her that she couldn’t hold out for much longer.

“It’s coming out...!” Hinako shouted.

A gushing stream of golden piss splashed against HImeko’s face. Her hair was drenched with the warm and salty piss. The stream was so strong that some of it splashed against the back wall. As the stream began to calm down, Hinako aimed it towards Himeko’s mouth. She quickly filled Himeko’s mouth with her piss. Himeko wanted to savor the taste of her urine, but it was coming out too fast and too strong for her to enjoy it. She gulped it down and made room for more. Hinako’s warm pee traveled down into her stomach, sloshing around and mixing with her shit. Hinako’s heavy stream lowered itself further down, drenching Himeko’s breasts in her piss.

The force of her urine was strong enough to drive Hinako to orgasm. As her last drops of piss fell onto Himeko’s nose, it was followed up by a bubbling stream of squirt. The taste of her squirt helped wash down everything else that had gone in Himeko’s mouth. Hinako was left gripping the bar, her breasts heaving as she recovered from finally clearing out her body. Himeko put her mouth on Hinako’s pussy, licking up and down her slit. The mixed drops of love juice and piss that were drying on her pubic mound created a delicious aftertaste in Himeko’s mouth. She used her tongue diligently until Hinako had been wiped clean, leaving only a layer of saliva behind.

Himeko put her face between Hinako’s butt cheeks. She licked her tongue along the brown streaks left behind in Hinako’s ass cleavage. The flavor wasn’t as intense compared to the thick and sturdy logs she had been chewing on only moments ago, but it was just as delicious to Himeko’s tongue. She stuck her tongue down Hinako’s butthole, gathering up the last little clumps of shit that clung to the inside of her bowels. Hinako’s entire lower body had been spit-shined. She had cum several times in a row while Himeko was eating out her pussy and butt, leaving her panting heavily. She wanted to lay down, which Himeko was fine with. It would make it easier for what she wanted to do next.

“Listen,” Himeko said happily. She told Hinako to put her ear up to her stomach. “Your shit is digesting in my belly... and it’s pushing my own shit out.”

“Are you going to poop?” Hinako asked.

“We promised we’d do this with each other,” Himeko said.

Hinako grabbed onto the sides of the squat toilet with her hands, and rested above it. She opened her mouth as Himeko squatted down above her. She had a clear view of Himeko’s wet pussy. Her clit was out of its hood, and her lips were engorged. Himeko’s twitching butthole was right above her face. While Hinako had little control over when her next turd was going to come out, Himeko was frequently constipated. It could be days between when she pooped, and she had been letting it build up until her stomach ached. She was ready to let it all out, over Hinako’s face.

“There’s a lot of gas in there,” Himeko said.

Himeko began by assaulting Hinako’s face with a barrage of farts. Gusty, airy farts that carried the deep stink from within her bowels. Hinako’s hair was blown about. The smell of her friend’s gas went up her nostrils. Hinako’s nipples were getting hard the more she sniffed, having no choice but to breathe in the foul air coming out of Himeko’s repeatedly twitching anus. The repeated straining and pushing of her lower body made Himeko start to piss before her shit came out. Her hot pee splashed against Hinako’s face, getting in her mouth. It filled up her mouth, dripping down her cheeks on the sides as the pee continued to flow without stopping.

“It’s Himeko’s pee... maybe it’s not so bad...” Hinako thought. She gulped it down and waited for more, only for Himeko to fart in her mouth. She coughed, and swallowed more piss. The streams of her pee came to a halt, and Himeko’s asshole started to widen. Compared to Hinako, her shit was harder in consistency and darker in color. She strained to push it out of her asshole, clenching and releasing until the tip of her turd dangled over Hinako’s face. Hinako raised her head, sticking out her tongue and licking the tip of Himeko’s log.

The taste was as awful and bitter as she had thought. She opened her mouth and sucked on the end of her poop, softening it until it was easier to chew. She took it into her mouth, absorbing more of the taste across her tongue. It was an acquired taste, but Himeko had been so eager and helpful in eating her shit that she wanted to return the favor. Hinako bit into Himeko’s log, taking off a part of it and swallowing what she could. Himeko strained her asshole, dumping more of her log into Hinako’s mouth. Hinako gulped down the rest, feeling the bumpy log making its way into her stomach. As the last of the first log emptied itself from her ass, Himeko ripped a loud fart above Hinako’s face, covering her cheeks in flecks of shit.

“I’m still bloated. I need to push it out from deep within,” Himeko said.

“I’ll eat it... all of it...” Hinako said.

Himeko put her hands on her knees. She closed her eyes and groaned. Her butt was so close to Hinako’s face that she was nearly sitting on it. Compared to Hinako’s plump and soft butt, hers wasn’t as wide, but it had a nice perky shape to it. Her cheeks were spread fart apart. Himeko put her hands on her ass cheeks, widening her asshole slightly more to allow room for her turd to come out. The next log started to drop onto Hinako from above, slowly squeezing itself out of Himeko’s butthole. Hinako stuck out her tongue, allowing the shit to pile up in her mouth until she closed it. She chewed on Himeko’s shit, turning it into smaller and smaller chunks until it was small enough for her to swallow, and another clump was starting to drop into her mouth.

Her nostrils were filled with the smell of shit. Her tongue had gone numb from the taste. It was barely that long ago that her stomach had been aching from the fullness of her bowels. Her stomach was feeling full again, as if she had eaten a hearty meal, and it was a meal made entirely of her friend’s shit. Knowing she was doing something that naughty made her pussy squirt across the bathroom tile. Himeko lowered her ass towards Hinako’s face, groaning like she was giving birth to her thick and solid turd. The brown, snaking log slid down Hinako’s tongue. It was close to her throat, at the right angle for Hinako to gulp it down with a loud noise. Himeko finished off her meal with another booming fart. Hot air blasted onto Hinako’s face. Hinako was blushing and sweating, trying to comprehend what she had just done.

“Lick me clean too,” Himeko said.

She sat on Hinako’s face above the toilet bowl. Hinako stuck out her tongue, guiding it through the valley of Himeko’s ass. She stuck her tongue inside Himeko’s butt, sucking out the last tiny ball of shit that had yet to fall from her hole. She gathered up the smears and streaks of cum onto her tongue. They were thinner in consistency than her shit, but stronger in flavor, with a terrible smell. She licked the remaining shit out of every wrinkle in Himeko’s asshole, until there was nothing left for her to suck but her own saliva.

Hinako got up from the floor. She was covered in piss and shit, and in need of a shower. Himeko unrolled toilet paper from the bathroom stall. Though they had used their mouths, they wanted to make sure they were really clean before putting their panties back on. Himeko reached around and wiped Hinako’s butt, and Hinako did the same to her friend. She took advantage of the moment to grab onto Hinako’s butt, squeezing her cheeks between her fingers. She’d always thought Hinako had a nice butt, but only recently had she become aware of how much poop she could hold inside it.

“Are you feeling refreshed?” asked Himeko.

“There’s nothing left,” Hinako answered. When they had entered the toilet, Hinako’s stomach had been slightly more bloated from the massive amount of shit she was carrying around inside her stomach. Leaving the bathroom, Himeko’s stomach looked like hers on the way in. Hinako blushed in embarrassment. All of her poop, which she had never wanted to show anyone else, was now digesting inside Himeko’s gut. She could still taste Himeko’s asshole on her tongue. Thinking about poop this much was making her want to go again, even if her bowels had been completely flushed out.

“You poop more often than I do. I’ll be your toilet any time. Just ask,” said Himeko.

The very next day at school, Hinako got up in the middle of class. She had been holding back her poop since first period, and was starting to fart during class. She ran out into the hallway, with Himeko joining up with her. They headed towards the nearest bathroom. Miu and Mana were walking in alongside them. Miu took a deep breath, and put her hand on Hinako’s shoulders. Hinako was so tense that she nearly shit her panties on the spot. She wondered if her reputation had spread through the school, even though Himeko had promised to keep it secret.

“You’re the girl who’s always pooping in school!” said Miu in an excited whisper. “Can I eat it?”

“I’m here to eat hers first,” Himeko said.

“You can try Mana’s poop. It’s the best,” said Miu. “I didn’t think there were more of us. Let’s go. I have a lot that I’ve been waiting to squeeze out.”

By the time Hinako emerged from the bathroom, her stomach was full of Himeko and Miu’s shit. She was very full, her stomach happily growling as it digested the fresh turds. Her mouth was dirty but her panties were clean. She was starting to feel like she could get used to this.