So the story part was written by Kamina44 and the sex part was written by me.
"Alright! Now, just like we practiced," said a young woman in bronze Spartan armor. She had a fair complexion, with scarlet hair tied into a ponytail and large C-cup breasts.
Her name is Pyrrha Nikos, champion of the Mistrali Arena for three years, and now loyal teammate and combat mentor to Jaune Arc.
"Ok. But I gotta warn you, I'm not going to hold back!" shouted the young Arc boy.
"I wasn't asking you to," Pyrrha said with a daring whisper.
Pyrrha moved forward and swung at Jaune's left side. He swiftly blocked the strike and lunged, only for Pyrrha to sidestep and make him stab at thin air. She then proceeded to swing her blade downward, only for her student to parry and repel her. He then took a stance: with his left foot lunged backward and his right stretched forth, he held Crocea Mors so that the faces of the blade faced both the sky above and the rooftop at their feet. He had a flame flickering in his eyes that screamed for a fight, like it found a purpose amidst this very moment, this very second.
Pyrrha arched a small smile and held her sword firm, before charging forth, her blade hanging back by her outer thigh. She went up to strike towards Jaune's torso, but then he spun around to avoid impact. He swung down to score a blow upon Pyrrha's right shoulder, but she caught Crocea, the tip just inches away from her face. She called upon her Semblance, as she pushed Jaune back with his breastplate. Jaune quickly reacted, and before being knocked back too far, he grabbed Pyrrha by her shoulder and dragged her down with him. They ended up falling on top of each other, with Pyrrha on top of Jaune. This made them blush from the close contact.
"Well, well, well. Look who was playing dirty," Jaune started, "using your Semblance like that."
"How did you know about my Semblance, Jaune?" Pyrrha asked with a hint of suspicion.
"I overheard Ruby and Weiss talking about it. About how your Semblance was the main reason I survived against that Ursa. Not that I'm complaining." Jaune always had a forgiving nature about him, especially towards his team. "In fact, I wanted to thank you personally."
"What do you- mmph?!" Pyrrha's question was interrupted when Jaune proceeded to kiss her with a passion foreign to her memory. At first, she lost her guard, but then quickly embraced the kiss, closing her eyes and wrapping her arms around her student, leader, and as of now: lover.
("Despacito" plays in the background)
Pyrrha pulled away from the kiss and sat on Jaune, slowly grinding on his crotch, making his member rise slowly, though this made his trousers feel tight being trapped by the trousers that Jaune was wearing around the belt which held the sheath.
"Let's undo this" Pyrrha said seductively as Despacito starting playing through the speaker system. She undid the belt, carefully pulling through each loop making sure not to break eye contact with Jaune. She heard the metal buckle hit the ground and moved back in to kiss Jaune.
She pulled his trousers just down enough to reveal his throbbing cock. His hands traveled down her armour, removing the belt before traveling back up under her skirt, gently removing the red panties that she was wearing. He wrapped his hands around her round ass, prising apart her butt cheeks and thus exposing her virgin asshole to the cold air of the gym.
Jaune's index finger then snuck into Pyrrha's rear hole, pumping it in and out in time with the music, Pyrrha let out stifled moans, not wanting to be to loud as others were using rooms around the gym. " Oh god, Jaune! Why didn't you tell me before!" Pyrrha moaned as Jaune added a second finger, still pumping in time to the music. "I'm nearly there!" Pyrrha cried.
"Not yet!" Jaune said calmly, slowly pulling his fingers out of Pyrrha's ass. "I want to make you feel the same amount of pleasure that I do when I spend time with you." With that he lifted Pyrrha up and gently pushed his thick cock towards her dripping cilt and gently pushed it in. Pyrrha gasped, not used to having such a large member inside of her. When Jaune noticed Pyrrha wincing in slight pain, he realized that this was her first time too; not that he thought that she had sex before or anything, they were both just distracted from the pleasure.
"Are you okay Pyrrha? I'm not hurting you an I?" Jaune asked in concern.
"I-it's okay Jaune, just please Jaune, fuck me." Pyrrha begged.
"Ok Pyrrha." Jaune replied calmly, as he pushed his dick further into Pyrrha's cilt. He started moving his member in and out slowly as to make it less painful for Pyrrha's first time by pounding in time to the beat, but then slowly two pounds per beat.
"Oh fuck Jaune! Your so good!" Pyrrha moaned. "I'm cumming!" Pyrrha cried as her pussy erupted with juices around Jaune's cock, spilling out of her pussy and down her leg. Pyrrha lay on the gym floor, panting, exhausted from the amazing orgasm she just had. And when she regained her breath, she looked up to the blonde and noticed his member still hard, meaning she came before him. She grew a smirk at his cock, thinking of a way to fix this problem.
"Now it's my turn." Pyrrha said, confident she could make Jaune cum faster than he made her cum. "Let's go somewhere a bit more private." As she pulled Jaune up so they were face to face. She moved in to kiss him passionately again, making sure the kiss was sloppy and dropping saliva onto his cock that was now sandwiched between Pyrrha's large, cum-covered tits. She began sliding her tits up and down on Jaune's pulsating cock, licking the head whenever it came through her bouncing tits, cleaning the pre-cum that leaked from the thick cock. She moved her hands in between Jaune's thighs and started massaging his thighs gradually working her way towards his low hanging fruit. She moved her hands up and started groping them making him gasp and groan dangerously loudly. "Oh god Pyrrha! You're so good!" Jaune cried as his dick was surrounded as her bouncing tits. "I'm gonna cum!" Jaune cried as his cock exploded with cum, Pyrrha immediately swallowed the small amount that landed on her tits. She swallowed Jaune's cock, making sure not to swallow the delicious salty, sweet and sticky liquid.
To finish their workout, Jaune lifted Pyrrha onto the table and started kissing down her body, nibbling at the prominent nipples through the tight fabric of the sprite bra. "Wait," Pyrrha said, pulling him back up and into a deep and passionate kiss, transferring the semen and saliva into his mouth. "Impregnate me Jaune." She whispered before pushing his head down to her dripping cilt. Jaune stuck his tongue out and licked Pyrrha's labia, slowly dripping cum out and moving toward the main entrance. He pushed his tongue into her entrance, pushing the still warm cum deep into her damp pussy. Pyrrha cried out in surprise at warm liquid inside her. Jayne moved back up and kissed Pyrrha as the cum oozed from her pussy, dripping down her leg, her skirt hitched up exposing her cum-filled pussy.
They heard the gym door click open, …
"Heya, guys! Whatcha doin'?" called an overly energetic ginger with D-cup breasts and a disposition for sugar, caffeine, any substance that boosts stamina.
"Nora, don't just ram the door open. You have to knock first so-" said a young, quiet boy with a pink streak in his raven black hair, before he caught a glimpse of their teammates' "training".
"Ren? Nora?!" said a shocked Pyrrha, who was currently wrapping her arms around her cum covered twins, as Jaune was slumped back and out cold from both their session and this little. . . interruption.
"So~," Nora started, "Are you guys, like, together-together now? Cause, I'd be totally excited if Ren and I joi-"
"GET OUT!" screamed Pyrrha, as she then used her Semblance to lift weights and gym equipment and started throwing it all at the two interlopers as they were running out of the room.
"Ugh," Jaune groaned as he woke up from his sudden slumber, "What's going on? Why's my head pounding?"
"It's nothing," Pyrrha explained, "Just two perverts getting an eyeful. But I took care of it."
"Oh. Cool." Jaune and Pyrrha were putting their clothes back on when Jaune called, "Hey, Pyrrha."
"Hm?" she responded.
"Don't think this is our only session. From here on out, I'm going to go all out! We're doing this again next week. Don't you forget it!" Jaune exclaimed with a newfound sense of pride.
"I'm counting on it, Bunny Boy" Pyrrha snickered.
"Wait. What?" Jaune asked, looking down at his Pumpkin Pete hoodie. "Oh, come on!" That's what happens when you try to act cool. You just end up making a fool of yourself.
Hope you enjoyed!