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The halls of Tracen had many different types of rooms. Daiwa Scarlet’s trainer was looking for her. She had just finished running around the track. Having set a new personal best, her trainer wished to congratulate her. She didn’t turn around, instead thanking him with her tail waving from behind. Daiwa dashed off in the other direction, turning the corner with her face flushed red. She had just set a record, and her trainer wondered why she was so embarrassed. She wasn’t in her classroom or the locker room. Her trainer heard her voice coming from down the hallway. Daiwa sounded like she was exercising. Her familiar grunts and heavy breaths echoed in his ears.
Tracen had a gym on the premises, but not every horse girl used it. Some preferred practicing outside, while others would be found in the cafeteria instead. He turned his head upward and looked at the sign above the doorway. It read “Breeding Mount Room.” The trainer opened the door, and gasped at the sight he saw within. The room looked like a repurposed locker room, with drains spread across the tile floor. The lights were soft and the buzz of the air conditioning hummed in the background, doing its best to dispel the scent of sweat and bodily fluids that permeated the room. Twelve breeding mounts on adjustable stands, six on each side, were lined up across the room. There were no dividers between them.
Daiwa Scarlet had taken one of the mounts near the back. She was wearing a red sports bra and panties, a preferred brand for horse girls. Her underwear was down around her ankles, while her hefty breasts were just barely restrained by her bra. The trainer had wandered into the locker room when the horse girls were showering after an intense race, and he had seen Daiwa naked before. For a few seconds before she threw a washtub at him. Her curvy yet firm butt shook as she held onto the handles of the mount. Her breasts shook, and the shapes of her nipples were visible underneath the fabric, small but hard. The room’s smell was unbearable for anyone who hadn’t spent a long time around horse girls, but her trainer was willing to brave it for her sake.
The smell of horse girl sweat covered every part of the room, having gotten on the floor and the walls. Daiwa didn’t notice her trainer coming in. She had sunk deep into the zone. Unlike the zone a horse girl encounters during a race, the breeding zone was another name for when they went into heat. Filled with an unquenchable lust that made them yearn to do nothing but reproduce. It was the only way the next generation of horse girls would rise to prominence. Her trainer walked around the mount, being careful not to slip in any of the puddles that covered the floor of the room. He rested against the other side of the mount, and looked Daiwa in the eye when she stopped thrusting her hips for a moment.
“I’ve been looking for you,” her trainer said.
“TRAINER! You weren’t supposed to find out about this yet,” Daiwa said.
“Find out about what?” asked her trainer.
Every thrust of her hips was accompanied by a wet squelching noise. The mounts were coated with a lube, designed by her mother Agnes Tachyon, that was slick and safe to consume. Drops of the lube fell from the opening of the breeding mount, falling onto the floor below. Daiwa held onto the handlebars, and groaned as she pushed her crotch inside. A louder spurting noise filled the room. The trainer looked down. A gushing mass of sticky white liquid filled the mount, clinging to the walls and filling in an empty space near the back. Daiwa stopped when she had exhausted herself. She released her hands from the bars, and stepped back. Her trainer felt a tingling stirring in his pants when he realized what he was looking at.
“I didn’t want you to find out about my penis, you jerk!” Daiwa said.
Hanging between Daiwa’s legs was a 70 cm horse cock. The tip of it reached a little beyond her knees, dripping the remaining semen that had been shot from the heavy, dangling balls swaying below. Even soft, Daiwa’s cock was far more impressive than his. Her trainer’s eyes wandered up and down her dick, admiring the length and girth of a futanari horse girl cock. A visible tent was forming in his pants, erect at the sight of seeing Daiwa’s naked lower body for the first time. Daiwa blushed, now shaking at the idea that her trainer still found her sexy, even after her secret was revealed.
“Do all horse girls have these?” asked her trainer.
“Mo... most of them,” Daiwa said. “If I don’t take my lust out in the breeding mount, I won’t be able to focus on the races.”
“That thing’s huge! How did I not notice it before?” asked her trainer.
Daiwa bent down. The tip of her cock touched the floor, smearing precum as her cockhead was dragged through a puddle of sweat. She picked up her underwear, and showed them to her trainer. They had been split down the middle at the front, leaving a gaping hole below the elastic waistband. “When I get hard, it can destroy my panties. These were extra-stretchy too, but my cock ripped through them like all the others. I’ll have to buy a new pair.”
“You don’t have to be embarrassed about it,” her trainer said.
“Who’s embarrassed?” Daiwa looked away from him, resting her breasts on her forearms. “Mine is bigger than Vodka’s!” She had measured hers against Vodka’s before. Each of them vigorously rubbing their horse cocks until they were at full erection length, then pressing them against each other before pulling out the measuring tape. The sensation of it was enough to make them cum. Daiwa’s cock twitched, and started to rise between her legs in front of her trainer.
“I think it’s sexy. It makes your lovely form even more beautiful,” said her trainer.
“You like my cock? Even though I’m a horse girl?” said Daiwa.
Her trainer didn’t want her to be the only one with her cock out. He dropped his pants in front of her, letting his own cock spring out. It was a good size for a human. Her trainer gripped his shaft and pulled back his foreskin, exposing his head, slick with precum. At 20 cm long, it was bigger than usual for a human, but paled in comparison to Daiwa’s massive hanging member. Daiwa wanted to see how serious her trainer could be. Once a horse girl and her trainer were close enough, having their trainers massage their pussies while they used the breeding mounts was a common practice, and sometimes going further than that. She wanted to gain his trust, and could think of only one way to do it.
Daiwa opened the breeding mount, and pulled out the onahole contained within. It was long enough to take even the biggest horse cocks, and Daiwa’s nearly touched the exit where the gathered semen inflated into a cum balloon. She held the masturbator, which jiggled in her hand like a mass of gelatin, and started squeezing it into a steel thermos. Her trainer watched as Daiwa’s fresh cum, still warm and very thick, filled up the thermos from the bottom. The first squeezes were easy to push out her collected semen. Successive ones required more force, draining as many drops of cum from the tool as she could before it dried out and clung to the insides.
Her semen was bubbling near the top of the thermos. The cup preserved its warmth. Daiwa thrust the thermos towards her trainer with a smile. “If you really love me, chug my cum!” Daiwa said. “My teammates say it’s delicious.”
The strong, pungent smell of Daiwa’s semen rose from the cup to greet his nose. Another drop of precum leaked from her trainer’s cock. He loved Daiwa and only wanted to see her succeed. Placing the rim of the thermos to his mouth, he gulped down the first mouthful of her cum. It clung to the roof of his mouth, filling his cheeks with the sticky texture and salty taste. Sticking to his throat on the way down, he powered through and swallowed more of it. It had the consistency of half-melted ice cream and none of the sweetness, filling his stomach with an incredibly rich flavor. Daiwa stood there, her cock twitching and growing longer and thicker as he guzzled down her semen. He polished off the last gulp, wiping his lips and setting the cup down on a nearby chair.
“Delicious,” he said.
“You drank all of it,” Daiwa said. “I didn’t think you were stupid enough to do that.”
Though Daiwa was berating him, she felt more in love with him than before. Her nipples were rubbing against the fabric of her sports bra. Overwhelmed with emotion and still in her heat, Daiwa felt a sharp burst of relief. She looked down, and saw two wet splotches on the front of her sports bra. White liquid dripped through the front of her shirt. The stench of sweat and semen in the breeding room was interrupted by a mildly sweet scent. Daiwa was embarrassed again, and tried to cover her chest with her arms, only to smear her arms with the liquid.
“Stop staring at my breasts!” she said. “This is... nothing unusual.”
Her trainer needed a moment to adjust. Having his stomach filled with Daiwa’s semen was a new sensation. It was still digesting, loudly gurgling as he took a part of her into himself. The lingering bitter aftertaste of her cum required something to wash it down. It was unmistakable what was pouring down from the front of Daiwa’s shirt. Her trainer asked if she had been pregnant before, and Daiwa denied it. The semen collected here was occasionally used to impregnate horse girls if their trainer or lover wasn’t willing or able, but Daiwa had never been pregnant herself. She was lactating because she was in heat, and her breasts had built up milk while she was fucking the mount.
“Can I drink it?” asked her trainer.
“Of course you can drink it. My boobs are some of the biggest at Tracen, and they’re full of sweet milk! Drink your fill, Trainer,” Daiwa said.
Her trainer pressed his hand against her right breast. He squeezed down, sending jets of white milk spraying in every direction. His forearm was covered in her milk. His mouth latched over her other breast, closing his lips around her nipple and sucking. The taste of Daiwa’s semen was washed down with her sweet breast milk. The silky texture and refreshing taste went down his throat with ease, warming his stomach when it landed. His sucking grew more powerful, while his hand massaged Daiwa and drew out more streams of milk. It gushed into his mouth. Sprays of milk landed on his dick, making it achingly hard.
“Trainer...” Daiwa said. “That feels good...”
Squeezing her breast to send more milk flying into his mouth, her trainer swirled it around before gulping. Daiwa’s left breast was feeling lighter. Her horse milk was full of fat, and calmed his stomach from the challenge of digesting her cum. When he had thoroughly sucked her breast, her trainer removed his mouth from her left nipple and moved over to her right one. His tongue circled around her areola, gathering drops of milk from her bumps before sucking hard on her tip. Daiwa moaned. Her hard cock rubbed against her trainer’s. The size of her dick made his feel small in comparison, but he didn’t care. Getting to drink the fresh milk of a horse girl was its own reward. He pressed his face into her sweaty bosom, and pulled away, tugging at her nipple for more of that sweetness.
“Stop! Stop! You’re going to make me cum!” Daiwa said. “My breasts feel so light.”
“Yet they look so heavy,” her trainer replied. The repeated stimulation to her nipples had made Daiwa’s cock return to its full erection. Her red pubic hair was visible behind her cock, framing it like a stage curtain. Her horse cock twitched, looking like it was about to empty everything it had onto the floor. Horse girl cum was sticky, and required a hose to push into the drain before it left a stain on the floor. Daiwa put her hand on her trainer’s head, and told him to open his mouth again. He wrapped his lips around her cockhead, taking what he could of her dick into his mouth. He was only able to fit the upper part of her member.
He had thought the taste of her cum was intense by itself. The cock musk of a sweaty horse girl in heat was overwhelming his senses. It went up his nose, cancelling out the sweet aftertaste of her breast milk that had been left behind. Sucking a cock, and one that wasn’t even human, would have been beneath him. His desire for Daiwa overrode everything. He licked each bead of sweat and precum off her cock. The unusual shape of her cockhead took some adjusting. It slid through his mouth, almost reaching his throat as he rubbed up and down the sides of her long shaft with his hands. Daiwa’s breasts and balls both shook as he stroked her, and her voice slowly turned into a series of cute moans. The feeling in her dick was too good to be true.
“That’s a good boy. Sucking my fat horse girl cock,” Daiwa said. “I thought I’d emptied my balls, but... urgh, they’re filling up again.”
“I’ll drink your cum again,” her trainer answered. He slurped and slobbered on her cock, savoring the musky smell. He moved his hands further downward, handling Daiwa’s balls. They were quite large. Gripping her testicles in his palm, her trainer lifted them to reveal her pussy underneath. It was puffy and wet, dripping with love juice that covered the back of her nuts. Her balls were hotter than her breasts when they were filled with milk. He rubbed them, stirring up her second load. Her shaft was trembling, already sensitive from her first ejaculation.
“Trainer, wait. I have another idea,” Daiwa sad. Getting another onahole for the breeding mount, lubing it up and getting it into place would take too long. She might lose her erection by then. Daiwa asked her trainer to grab the handlebars of the mount she had used and stick out his butt. Doing as he was told, her trainer stripped naked and pushed his ass towards her. His ass was cute, she thought, and the way his cock dangled below made her even prouder of her fat dick. She approached him from behind, pressing her leaking breasts against his back. Lines of warm milk ran down his back as Daiwa pressed her cockhead against his tight butthole, lubing up his ass with her precum.
“What about the breeding mount?” her trainer asked.
“Idiot. You’re my breeding mount,” Daiwa said, whispering seductively in his ear.
His asshole widened as Daiwa popped in her cockhead with a wet sound. The exposed pink part of her cock was able to fit inside him somewhat easily despite its girth. Daiwa brushed against his prostate on the way in, making his cock twitch and spray precum onto the floor. The softness and warmth of her breasts against his back soothed him even as Daiwa’s massive horse cock continued sliding into his asshole, pushing all the way in until he had taken it up to the base. Daiwa breathed a sigh of relief, and praised her trainer even as he groaned under the pressure. “Not even my teammates can take my meaty cock all the way. I can’t believe this is how you’re losing your anal virginity. Once you’ve tasted my cock, nothing else will feel the same.”
Her heavy balls slapped against his thighs. Daiwa pulled her cock back. Her cockhead got caught on his asshole, and she pushed back in. A horse girl’s thrusts were powerful, and to a human felt as intense as the roughest sex. Daiwa’s breasts pressed into his back, her hard nipples digging into his skin as her balls moved back and forth, swinging like a pendulum. She was sweating profusely, leaking salty drops from her armpits and underboobs. Her entire body shimmered with an oily sheen. She removed her chest from his back, making it slap against her body with fleshy sounds. Drops of milk sprayed everywhere.
The fullness in her trainer’s colon was more intense than he had anticipated. He gripped the breeding mount, hoping his sweaty palms wouldn’t cause him to slip. Daiwa’s cock was filling his entire lower body, pushing and pulling to where it felt like it was going to remove his soul from his body. Her gentle moans, showing the softness underneath her cold and haughty exterior, were turning him on as much as the cockhead grinding against his prostate. His cock swung back and forth, swaying and holding back an orgasm. His lower body was hot and tingling, overwhelmed with a pleasure that transcended anything an ordinary human would experience.
“Your asshole is better than the breeding mount,” Daiwa said confidently. “It’s shaped for my pleasure.”
“Daiwa...” her trainer squeaked out a breathy voice.
She moved her hand down to his cock. Daiwa stroked the shaft with her milk-covered hand, caressing his balls before returning to the tip. He was extremely sensitive. Holding back blowing his load for so long, and having Daiwa’s massive member taking him from behind, made him feel like he would pass out when he came. It was only his love for Daiwa and the pleasure of their first time spreading through his entire body that was keeping him awake. Daiwa stroked his cock, matching the wet sounds of her hands on his penis with her own thrusts. She could sense how hot and throbbing he was, nearing orgasm with each gesture of her fingers.
“You can cum,” she whispered in his ear. “After.”
Giving a final, forceful thrust of her cock into his butt, Daiwa’s balls blew their second load into his tight and waiting hole. It was just as thick and gooey as her first one, clinging to the walls of his ass and soaring deep inside. Her trainer felt it behind his stomach. Daiwa’s semen filled him up from the other end. His cock twitched, and blasted two hot and creamy ropes. They landed on the underside of the breeding mount, hanging from it like melting snow. Daiwa stayed inside him, pumping every bit of cum she could into his ass. Even after he fell limp, her cock had more to unload. His stomach swelled with a slight bulge.
Daiwa pulled out of him. Her cock was limp once again. The two of them lay down on the floor. They were covered in sweat, and wanted to cool down. Her trainer’s asshole was sore. The pain was keeping him from falling asleep as his hole tried to close. Daiwa’s cock rested across her thighs. She pulled her trainer over, inviting him to rest his head on her breasts like a comforting pillow. He stuck out his tongue, lapping at the milk coming out of her boobs. She still had a few more squirts of milk left, even if her balls were completely drained.
“You’re not so bad, for a dumb trainer,” Daiwa said. “If you want to do this again, we can do it somewhere more private than here.” He was about to fall asleep on her chest. Daiwa wondered if she should carry him back. The two of them were naked. A series of shower stalls, similar to those in the locker rooms, were just around a corner at the other end of the room. Daiwa picked up her trainer and helped him walk back to the showers with her. She nudged him with her cock, telling him to wake up. “That was the best mounting I’ve done yet. Next time, I want you to... watch me.”
“You can show me that cock anytime,” her trainer said.
“I mean, sure,” Daiwa said. “If you praise me like that, I’m going to get hard again! I just came, why do I have to be so horny?”