Komaru kept adjusting her skirt, trying to make sure that her bottom half was covered up, that it wasn't obvious that she wasn't wearing any panties. As she did, she walked beside Makoto, holding his hand, surprised at how soft it was.
"So, where are we going?" Makoto asked as Komaru gently led him along.
"I…um…so you know how the gym has a swimming pool barely anybody uses?" She asked.
Makoto smiled a bit as he tried to focus away from how his pants rubbed directly against his cock. He could barely remember the last time he actually wore underwear around Komaru. "Yeah~?"
"I'm assuming you already know where I'm going with this, but you're not gonna let it go without me actually saying it, so…" She paused, "…let's go skinny dipping."
Makoto leaned forward and kissed his sister on the cheek. "And what happens if people actually show up?"
"I mean, it'll be embarrassing, but we can pass off as two lovestruck teenagers that did something stupid." She explained.
Makoto shrugged. "Alright, sounds fun. You lead the way." Komaru smiled as the two went inside the gym. They paid the front desk for entry, hoping the girl behind the counter wouldn't notice Komaru's nipples poking through her shirt, as she also wasn't wearing a bra, and was already horny thinking about swimming naked with Makoto. If she noticed, she didn't say anything, and the two continued to the locker rooms. They were about to separate, just in case, but then…they heard a strange…but familiar noise. It sounded like both a man and a woman…in the girl's locker room.
"Do you hear that?" Komaru asked.
Makoto froze. "Yeah...think we should come by on another day?"
"I mean…wait…" She listened closely, to make sure it was what she thought it was. "Do you…wanna go see?" She asked with a smirk.
Makoto froze and started blushing, even if the thought of that made him just a little hard. "I-I-I guess?" She smiled as she pulled him into the girl's locker room. As they entered the room, the sounds became louder, and now it was easy to tell what it was: kissing and moaning. The locker room was in a kind of L-shape, so Makoto figured it would be easy. Komaru led him up to the corner, they peaked around, and-
"AOI!?" Makoto exclaimed in instant shock.
"YUTA?!" Komaru shouted at the same time. The two froze in the middle of a kiss, Yuta's hand underneath Aoi's shirt, gripping her breast tightly. Both of their faces slowly turned a bright red as they stared back at the siblings.
"Oh hi Makoto!" Aoi chirped in a burst that came half from shock and half from some kind of genuine joy at seeing Makoto of all people here. But the last syllable trailed off as she realized what Makoto and the girl who seemed to know Yuta had just seen.
"H-hey Komaru…" Yuta said with a nervous smile on his face as he tried to nonchalantly peel himself off of Aoi. Any trace of mischievousness in either of the siblings was replaced with a kind of shocked fascination as they stepped out from behind the wall in perfect tandem.
"So, what's happening here?" Makoto asked.
"We were just…um…" Yuta seemed to be struggling to come up with an excuse, and quickly looked over at his sister for help.
"Checking on each other's physical health!" Aoi continued. "Yeah…just a nice innocent checkup..."
"Yeahhhh, we're not that stupid." Komaru said. "You guys were all over each other, and you were…pretty loud too."
The blushes on their faces grew as Makoto turned to his sister. "Do you know, uh, 'Yuta' here?"
"Yeah, he's a friend of mine! And you know the girl?" She asked. As the two talked, both Aoi and Yuta looked to each other, the look of fear growing on their faces.
"Yeah, Aoi, she's a classmate of mine."
Aoi shuffled away from her brother as she tried to nonverbally plan some way out with him.
"So your classmate is dating my friend? What a coincidence! And I thought we were quite risky." Komaru said, and then suddenly froze. She looked over at Aoi, who stared back, having been discovered. "Wait a minute…that name sounds familiar…"
Aoi and Yuta's breath hitched as Makoto's eyes widened and he pointed a finger at them. "Oh, you two are siblings!"
Komaru's eyes widened in shock. "Right! You said your sister's name was Aoi!" Yuta gulped.
"L-look, we can explain…" He started to say.
Makoto laughed a bit and waves Yuta down. "No need to, we completely understand."
"Huh?" Yuta asked, and Komaru smiled.
"This is my brother Makoto! Annnnd…" She said as she moved behind Makoto, grabbed his pants, and without warning, yanked them down, Makoto's semi hard on popping out freely, which Komaru immediately wrapped her hand around and gently squeezed.
Makoto yelped and jumped a little, covering his sister's hand and his dick with his own hands while trying to turn away. "Ah, not so rough! Stop that!"
"Hehehehe, sorry~" Komaru said as she stepped back. "See, we're the exact same way!"
Makoto pulled up his pants as he exhaled. "You could've been more tactful," He muttered.
Komaru stared at him blankly. "I don't know what that means."
Aoi and Yuta watched the whole thing unfold, but despite how awkward it must've been, Yuta found himself a little aroused by how Makoto looked. He never had any problems with the idea of being attracted to guys as much as he was attracted to his sister, but seeing a guy like that now definitely was making him think a few things. Komaru noticed Yuta staring at Makoto, and walked over to him, immediately placing her hand on his crotch, feeling how hard he was underneath, and causing the boy to jump. "You found that hot, didn't you~?" She asked.
"I-I just…" He started, but before he could, she moved over to Aoi and looked directly at her cleavage.
"Damn, you're pretty stacked too!" She marveled.
Makoto walked over as well and sat next to Yuta, pressing against him slightly as he watched Komaru oggle his friend's chest.
"Hey, stop that!" Aoi replied to Komaru, covering her chest and turning away.
"Why? You should be proud!" Komaru said as she walked behind Aoi and found a way to slip her hands underneath the swimmer's shirt and place her hands against her chest directly. "Ah, you're going commando, too~?" She asked as she squeezed her large chest, pushing her body against the swimmer's.
Aoi shivered under Komaru's touch, trying to squirm away from the strange yet familiar sensation of someone touching her chest. Komaru's fingers were softer than Yuta's, and she groped with a lot more confidence than he did. Still, she whined- "This is so weird!"
Makoto wrapped an arm around Yuta's shoulder and whispered in his ear, "What do you think~?"
Yuta shuddered as well, feeling his dick push hard against his pants. "I…don't know." He finally said.
Makoto reached down and pressed the palm of his hand against the bulge in Yuta's cargo shorts. "Let me help you with that then~" Makoto pulled down Yuta's pants at the same time that Komaru yanked off Aoi's shirt, leaving Aoi's breasts bouncing free from their fabric confines as Yuta's cock stood at full attention.
"OH MY GOD!" Yuta said as he rushed to pull his shirt down over his dick. His dick was exposed! In a public place!
Aoi leapt off the bench and crossed her arms over her chest. "Don't do that, what if someone walks in?" At the same time, Makoto grabbed Yuta's dick and gently stroked it, starting to kiss at the younger boy's neck as he did so.
Komaru didn't answer Aoi. Instead, smiling, she pulled off her own shirt, as well as undid her skirt and let it drop to the floor as she stepped out of it, leaving her completely nude. Immediately, she felt her horniness shoot through the roof, especially as she saw the swimmer's eyes roaming all over her body. Still remaining silent, she walked over and wrapped her hands around her back, pulling her close and causing both girl's pairs of large breasts to squish together, their nipples briefing touching.
Meanwhile, Yuta cried out as his legs shook. The boy's hand was surprisingly soft, which was so strange compared to how viciously kissed at his neck, which made him moan.
Aoi moaned as Komaru pulled her close, her body tensing up at how strange this situation was. She had never found herself attracted to girls, and yet, her confidence, and how soft her body was...it was enough to make Aoi slightly aroused as her shorts rubbed against the other girl's bare pelvis.
Makoto let his mouth move up and he gave a tentative lick to Yuta's ear as he ran his thumb over the head of the boy's cock.
"Do you like watching your sister get touched like that~?" Makoto whispered as he wrapped an arm around Yuta's stomach, pulling him close to his body.
"Y-yes…" Yuta groaned as he felt his legs buckle and he fell back onto the bench, his dick throbbing with need for more of the boy's touch. His clothes felt heavy, and hot. Even his pants, which still lay at his ankles, felt like a weight that needed to be removed.
At the same time, Komaru leaned forward and embraced Aoi in a kiss as her hands trailed down her back and slipped underneath her shorts, finding no panties underneath as her hands cupped the girl's ass cheeks, squeezing them tightly as her shorts rode down a bit.
Aoi whimpered into the kiss as she hooked her fingers in the waistline of her shorts and began pulling them down her legs.
A sudden rough urge overcame Makoto, and he yanked Yuta's jacket off his body and his shirt over his head and made him kick his pants off, leaving the clothes in a pile next to the bench and the boy nude and panting right in front of him.
Yuta shuddered as he was suddenly completely naked before he knew it, in such a public, risky place! But…it felt so good…
Komaru wiggled her tongue inside the swimmer's mouth as she heard her shorts drop to the floor, and the noise of her stepping out of it. Now both girls were naked, and Komaru was able to freely grope her ass cheeks, relishing in how her body shuddered.
Makoto grinned and stripped quickly, leaving himself naked next to Yuta as well, his erect cock on full display for the boy to admire. At the same time, Aoi tentatively brought her hands up to Komaru's chest and gave each breast a light squeeze.
Komaru felt herself smile against the kiss at Aoi starting to make her move, and more forcefully pushed against her body, kissing her deeper, wrapping her tongue around the swimmer's as she spread her cheeks and let them go, feeling and hearing them slap back together.
Yuta felt his mouth go dry as he stared at the boy's cock, standing at full mast, seemingly just for him. He wasn't sure how to proceed from here, still in shock at being nude in such a risky place.
Makoto shifted a bit as he sat up, placing his knees on both sides of Yuta's head and looking down at him, in love with how the boy stared at his length. He adjusted himself a bit so that it hung down right over Yuta's face, the head pressing against his lips just a bit. "Open wide~"
At the same time, Aoi shivered against Komaru as her arousal began taking over. Her tongue tried in vain to fight back against Komaru's force and skill, and her hands roamed gently over the younger girl's body.
Komaru gently pushed the girl over to another nearby bench, pushing her on top of it as she wrapped her legs around her, pushing herself as closely against the girl as she could, her hands moving all over her back and her ass as she wrestled with the swimmer's tongue.
Yuta felt his face burn as he slowly opened his mouth, leaned forward, and took Makoto's head inside, closing his lips around it as his tongue flapped against the slit, licking up his precum.
"Good boy," Makoto teased as he thrusted forward, gagging Yuta on his penis with one quick motion.
Aoi, meanwhile, found that Komaru's chest was as good of a place as any to keep her hands busy with, as she reached up and pinched one of the girl's nipples while massaging her other breast with her spare hand. At the same time, she steadied herself on the bench and found herself spreading her legs, desperate for some kind of stimulation to her aching pussy.
Komaru moaned into Aoi's lips as she felt her sensitive nipples getting played with, but managed to maintain the kiss. She noticed Aoi spreading her legs, so she pulled one hand out from behind her back and slid it between the swimmer's legs, feeling her wet juices coat her fingers immediately as she stroked the outer lips.
Meanwhile, it took Yuta a moment to recover, but when he did, he found himself moving his head forward at the same time Makoto thrust inside, feeling his own dick twitching in response as he felt his arousal growing stronger.
Aoi's hips bucked as a sudden jolt of stimulation shot through her, her body jerking hard enough to remove her from the kiss. "K-komaru..." She moaned.
"That's right, you're doing fine," Makoto cooed as he leaned down and grabbed Yuta's hips, using them as a handle to thrust hard into his throat.
Yuta could feel Makoto's dick throb inside his mouth as he did his best to use tongue to flick against as much skin as possible. Even the feeling of it ramming the back of his throat somehow became enjoyable.
Komaru didn't wait to shove her finger inside Aoi's pussy, feeling her entire body jerking in response as she felt her inner walls clench tightly around her in such a way that Komaru almost moaned herself.
As quick as he began, Makoto pulled out and smacked his penis against Yuta's face. Without speaking, he pulled Yuta up and then pushed him onto all fours, groping at his ass as he did so.
A burst of needy lust overcame Aoi, and she pulled Komaru into a more forceful kiss for a second before pulling away and looking her in the eyes. "Touch me more, like that, please~"
"My…pleasure~" Komaru said, trying to catch her breath. She wiggled the finger around inside the swimmer, trying to find her most sensitive spots as she used her other fingers to gently run around the outside of her pussy.
Yuta gasped as he felt Makoto's hands on his ass, but also enjoyed it immensely.
Makoto reached one hand around and hooking his index finger in Yuta's mouth, pulling his face into a lewd position as he felt the boy shiver and squirm under his touch. At the same time, Aoi kicked and jolted at the bursts of pleasure Komaru gave her.
Komaru sucked on the girl's neck as she started thrusting her finger in and out of her dripping wet pussy, feeling her body shuddering violently, feeling her breasts jiggle against her own, which only aroused the girl further. For now, she was focused on making Aoi cum, then she had an idea of how to make herself feel good as well.
Yuta on the other hand, was now more confused, especially by Makoto pulling at his mouth. But even more so, he was desperately aching for something, anything to happen as he felt the boy's small fingers caressing his ass.
Makoto pulled the finger out of Yuta's mouth and, using the added lubrication, gently pushed it inside of the boy's ass.
"Komaru I...I-" Aoi began before beginning to squirt all over Komaru's hand and forearm.
Komaru jumped at how sudden it was as she felt the warm fluid splash onto her, but she held her finger in place as she let Aoi finish, surprised at just how much she seemed to have inside her. She held Komaru tightly as she emptied herself, until she was left breathing heavily as she laid her head on her shoulder.
Yuta groaned and moaned, his entire body shaking as he felt the finger enter him, never having experienced something like this. He felt pleasure coursing through his entire body, and could barely hold himself up.
Makoto was a little rougher than he should've been, quickly adding another finger and pumping roughly in and out of the young boy. But his cock was absolutely aching from being unable to cum, and he knew exactly where he wanted to finish, so he pressed forward.
When Aoi was finished, she started kissing at Komaru's neck and collarbone, desperate for more.
Komaru couldn't help but giggle at the girl's desperation, and allowed her to simply experience as Aoi's kisses ran across her neck, until she suddenly grabbed one of Komaru's breasts, and lifted it up, placing her lips around the hard nipple, making Komaru moan loudly into the swimmer's ear.
Yuta shuddered and shook, his body unsure what to do with this strange form of stimulation he was experiencing. All he knew was that he enjoyed it immensely.
Aoi slid a leg in between Komaru's, beginning to turn the younger girl to the side as she suckled her.
There was a slight popping noise as Makoto pulled his fingers out of Yuta, and he adjusted himself to stand on his knees and position his cock right up against the boy's loosened hole.
At the same time, Komaru let Aoi guide her down as she adjusted herself so their legs were wrapped in a way that their pussies were inches apart.
"Are you ready?" Makoto asked as he teased Yuta by rubbing his cock up and down the boy's ass.
Aoi didn't bother with formalities, releasing Komaru's breast from her mouth so she could press forward and rub their pussies together, their wetness mixing together as they both moaned in tandem.
Komaru reeled her head back as she let out an intense moan, extreme pleasure exploding throughout her entire body unlike anything she'd felt with Makoto before.
"R-ready for what?" Yuta asked.
Makoto grinned and thrust forward, delighting in how the shock paralyzed Yuta as the boy felt himself being spread open. That was probably a mean thing to do, but he knew that Yuta would enjoy it either way.
Yuta felt intense pressure inside his ass, but in a way that made him feel better than he could've ever expected. It had only just started, and already he wanted more.
Komaru ground her hips against Aoi's, her body shuddering in ecstasy as their lips rubbed together, their juices mixing in a beautiful concoction of arousal, the noises like music to her ears.
Makoto put both his hands on Yuta's shoulders and pulled the boy back as he thrust forward, angling his hips just enough to brush his cock right up against Yuta's prostate with each thrust. Little bursts of precum dripped from Yuta's dicks onto the bench as their moans mixed with Aoi and Komaru, who were lost inside of the motion of their bodies rubbing against each other in such a lewd manner.
Yuta was surprised to feel that his dick pulsed with every thrust. He could feel pressure building inside himself, like when he masturbated or when Aoi did it for him. Was he…was he going to cum without even touching his dick?!
Komaru meanwhile felt a similar pressure building inside herself as she moved her hips faster, grinding hard into the swimmer, watching as her breasts bounced up and down with each movement.
Aoi was entranced by Komaru's body. The matching sway of her chest, the gorgeous smoothness of her skin, the unimaginably lustful and needy expression on her face...it was almost enough to drive her to the edge right then and there.
At the same time, Makoto felt his own dam about to burst, enraptured by how Yuta's body trembled and how he moaned for more as Makotos' dick hilted inside of his tight ass.
"M-Makoto…" Komaru said suddenly. "Don't hold back…" She felt it coming fast, and so she let herself go, and moaned as she came, spraying her cum onto Aoi's waist and belly, her body shaking against the swimmer's as she finally felt release from everything built up over who knew how much time. It felt like ages before she finished, but even so, she kept going, as she could tell that Aoi was about to cum for the second time.
Almost at the same time, Yuta cried out as he came violently, spraying the floor with his cum as it flowed out of his rock hard and throbbing dick. It was an impressive amount and lasted for several seconds before he finally stopped.
When Yuta finished, Makoto began; pouring an almost as large load of cum inside of the boy's ass, enough that his unprepared hole overflowed and leaked a bit of cum back out onto his thighs and the bench surface.
Aoi pulled back and squirted again, hard enough that a small burst hit Komaru in the face and left a small trail across her stomach and chest.
Both Komaru and Yuta waited as the other two finished, before everyone collapsed onto the floor, panting and out of breath, their hearts beating rapidly. Nobody spoke for a while, until Komaru finally broke the silence.
"We should do this again sometime."