Hiro's Harem
Copyright© 2025 by Mehefin013
Chapter 15
Fan Fiction Sex Story: Chapter 15 - Hiro may be the youngest person to ever attend SFIT, but that doesn’t mean he’s too young to handle the various challenges that come with college life, including love. But what will he do when that particular challenge comes from several different sources at the same time? (Updated twice a month)
Caution: This Fan Fiction Sex Story contains strong sexual content, including Ma/Fa mt/ft Ma/ft mt/Fa Fa/Fa ft/ft Fa/ft Mult Teenagers Consensual Lesbian BiSexual Heterosexual Fan Fiction Sharing Incest Father Daughter Aunt Nephew Group Sex Harem Polygamy/Polyamory Interracial White Male White Female Hispanic Male Hispanic Female First Masturbation Oral Sex
In all the excitement of giving Megan her present Hiro had completely forgotten that there even was another one. But now the little box sitting over on his dresser demanded his attention. If what just happened was any clue of what his present might be, he could hardly wait to see what was inside.
Karmi scooted off the bed and went to retrieve the box, with Megan following her. Hiro could already feel the stirrings of a new erection as he silently appreciated their nude bodies despite having just come only a couple of minutes ago. With their backs to him Karmi quietly asked Megan if she was ready, and got a nod in response. When they turned around to face him Hiro noticed both girls were blushing rather heavily, something he found rather odd considering their earlier activities.
“So ... this is actually from the two of us,” Karmi began, holding out the gift. “Megan and I discussed it at length over the last week, though I’ve been thinking about it for a lot longer than that.”
“If you’ve put that much thought into it then I’m sure I’ll love it, whatever it is,” Hiro said, accepting the tiny box.
“I’m sure you will,” Megan said, nervous energy making her almost vibrate where she stood. “Open it, Hiro.”
Carefully untying the bow that held the box closed, Hiro lifted the lid and looked inside. He wasn’t sure what to expect, maybe some nude pictures of the two girls, but there was no such luck. Instead there was a neatly folded piece of paper, decorated with a fancy border and even perfumed with some sort of floral scent. Taking the piece of paper, he unfolded it and his eyes were drawn to the large flowing script of the title.
“Boyfriend Agreement?” he read out loud, arching an eyebrow at Karmi in confusion.
She gave him a reassuring smile and said, “Keep reading.”
Hiro glanced at the rest of the ‘agreement’. It was divided into three columns with each section having a spot at the bottom for a signature. He started with the first column and began reading out loud. “I, Karmi Reza, on this 24th day of December-”
As he began to read, Karmi began saying the exact same thing, even though she couldn’t see the words from where she was. Clearly she had the whole thing memorized. Hiro stopped speaking as he listened to his girlfriend, reading the words as they were spoken. His eyes grew wider by the second by what she was saying.
“I, Karmi Reza, on this, the 24th day of December, do declare that Hiro Hamada, my boyfriend, is hereby allowed to take Megan Cruz as his second girlfriend, on the condition that he not neglect me in any way, shape or form, and that he treat her with the same level of love, caring, and respect that he has shown me. And I promise to not let any jealousy or possessiveness get in the way of their relationship.”
Hiro sat in stunned silence. Had his girlfriend just told him he could have sex with another girl? Eventually, he found his voice. “Um, Karmi, are you-” he managed to say before Megan interrupted him, reciting the next portion of the agreement.
“And I, Megan Cruz, on this, the 24th day of December, do declare that should Hiro accept, then I will never try to take Karmi’s place as primary girlfriend, and in perpetuity give her veto rites to anything and everything that Hiro and I do together. And I also promise to not let any jealousy or possessiveness get in the way of their relationship.”
It was a good thing Hiro was sitting down because had he been standing he surely would have fallen over. As it was he could only stare at the paper in his hand, utterly bewildered by what the two girls had just said. He sat in stunned silence for nearly a minute as his mind tried to digest what was being offered.
With Hiro remaining completely motionless the two girls started to grow concerned as the seconds ticked by. “Um, Hiro? Are you okay?” Karmi asked.
“Earth to Hiro,” Megan added when he remained unresponsive. “Anyone home?” She snapped her fingers right in front of his face, which seemed to do the trick.
Hiro shook himself from his daze and looked up at the other two. “Uh, sorry, I kind of was lost in thought for a second.”
“That was a lot longer than a second,” Megan said. “So ... what do you think of our present?”
Hiro couldn’t help but let his eyes wander over Megan’s body. She was different from Karmi in so many ways, but no less desirable for it. It was also obvious that she was extremely nervous, clearly worried that he might say no. Surprisingly, Karmi looked just as worried. He met her eyes before asking, “This isn’t some sort of test is it? Or maybe a prank?” It wasn’t that he didn’t want to believe her, but this situation was honestly too good to be true.
Karmi shook her head. “No test. No prank. We’re one hundred percent serious.”
“Megan?”
“Karmi’s telling you the truth. I want to be your girlfriend and she’s agreed to share. If you’re okay with it, that is.”
“This isn’t a dream is it?” Hiro asked, still hardly believing that this was really happening.
“Nope.”
“I, uh, I’d be a pretty big idiot to say no, wouldn’t I?”
“Yes, you would be,” Karmi said, a small smile appearing on her face. “And we all know you’re no idiot.” She grabbed a pen from the desk and offered it to Hiro. “So how about we make this official?”
Hiro was confused for a second before remembering there was a third column on the paper in his hand. He quickly read through it before repeating it out loud slowly and carefully to make sure he got the words right. “I, Hiro Hamada, on this, the 24th day of December, accept both Karmi Reza and Megan Cruz as my girlfriends, and that whatever I am willing to do with one of them I am willing to do with the other. I promise, to the utmost of my ability, to love, cherish, and honour each of them without neglecting or favouring the other.” Blushing heavily, he took the offered pen and signed his name to the bottom, where his signature joined the two already there.
Karmi reverently took the signed document and carefully placed it back in the box for safekeeping. She already had plans to laminate it for further protection but that would be for later. Now was a time for celebration.
All three teens wore excited smiles now that they were on the same page, but Hiro wasn’t quite sure how to move forward without seeming too eager. Now that he had permission to go all the way with Megan, he definitely wanted to but he didn’t want to offend Karmi by doing it at the earliest possible moment. “So now what?” he asked, looking for a little guidance.
“Now,” Karmi said, crawling onto the bed next to Hiro with Megan mirroring her on Hiro’s other side, “it’s time to remind you that you’re still sitting under the mistletoe.” With that said, she and Megan leaned in and kissed Hiro on both cheeks.
The kiss started out very similar to what they had done before, but this time they weren’t wearing any clothes and the two girls took advantage of the nudity. They let their hands roam over Hiro’s body, caressing his chest, then leg, before grabbing onto his already stiff member, one of them more cautiously than the other. Karmi touched him first of course and gave a few strokes before letting her hand rest at the base of his dick. Megan, who had never touched one before, tentatively wrapped her fingers around the shaft near the top. A thrill shot through Hiro’s spine as she made contact and he just smiled like an idiot as he looked at the two girls’ hands wrapped around his cock, still not really believing this was happening.
The kiss ended but the girls kept their hands warped around Hiro’s dick. They all exchanged glances, looking at each other and where the girls’ hands were, silently making sure that each was okay with what they were doing.
Although Hiro was in heaven with just this, he was also eager for more. “So,” he asked, “when our agreement said whatever I do with one of you I can do with the other, were there any restrictions?”
“None,” Karmi said.
“None,” Megan agreed.
“Then if I did this,” Hiro said and reached out and caressed one of Karmi’s bare breasts, gently running his thumb over a stiff nipple. “I could do the same to Megan, right?”
“That’s right,” Karmi said, smiling at his touch and surprisingly eager to see him give Megan the same treatment.
Hiro met Megan’s eyes, who returned his look with eager anticipation. Hearts pounded in chests as all three of them eagerly waited for the line to be crossed. Even though Hiro had formally accepted Megan as his girlfriend, there was saying and then there was doing. With a hand that he only barely managed to keep from trembling, he reached out and cupped her pert breast. Goosebumps broke out on her skin and both of them shivered at the contact. Like with Karmi, he gently ran his thumb over her skin, eventually making contact with her nipple. Megan’s breath grew heavy as she let Hiro explore her aching body and it was all Hiro could do to not throw her down onto the bed and take her. However, he knew this was her first time and wanted it to be the best possible experience, not something fast and hard that would be over all too soon. That could come later.
Reluctantly he let go of that lovely bit of flesh and turned back towards his first girlfriend. “And if I were to do this,” he began, then tilted Karmi’s face towards his and proceeded to give her the hottest kiss he could. Karmi was left breathless when it ended nearly a minute later. “I should probably do the same to Megan.” he finished.
“Uh, yeah,” Karmi said after a few seconds, still feeling lightheaded from the kiss.
Hiro looked over at Megan, who had the biggest smile he had ever seen on her. Gently he touched her chin and tilted her head up so she’d be at the ideal angle, then kissed her. It was tentative at first, this being their first kiss as lovers, but excitement and arousal soon had Megan crawling onto Hiro’s lap and cupping his face as she slipped her tongue into his mouth, where it was met with enthusiasm.
The two moaned into each other’s mouth as their tongues duelled, Hiro’s experience with Karmi allowing him to drive Megan absolutely wild with desire. Eventually they broke apart, the need for air unable to be ignored any longer.
Hiro managed a brief glance over at Karmi, who was watching them with an excited expression. “Don’t worry about me,” she said, noticing his look. “I’ve already had a turn. You two keep going.”
“But what are you going to do?” he asked before Megan captured his lips with hers again.
Karmi slipped off the bed and picked up something from amongst the discarded clothes. “I’m going to record you,” she answered, holding her phone up for the others to see.
“Oh shit, really?” Hiro asked as Megan shifted from his lips to his neck. The thought of having a video of this moment was both exciting and nerve wracking. He would definitely cherish such a thing, but if her father were to ever find it...
Karmi smiled. “Yes, really. You and I have our first time on video, so it’d be a shame if Megan didn’t have the same kind of keepsake. In fact,” she added as she grabbed Hiro’s phone from where it was on the bed, “I think I’ll record it from multiple angles. Do you think Base-max might be able to render it into a proper 3D simulation with that?”
“Oh god!” Hiro moaned as Megan licked his collarbone. “Um, she could probably make due with just one, but two would allow her to be more accurate.”
“Good,” Karmi said, then set up a chair near one part of the bed and angled Hiro’s phone to get a good side view of the action. With her own phone in hand, she began recording the other two on the bed, circling around them and making sure the camera caught every part of their nude bodies until she was on the opposite side of the bed. “Now don’t let me distract you. Do whatever it is you want to do.”
“Can do,” Megan said, sparing a grin towards the other girl, then began kissing her way down Hiro’s chest and stomach.
“Oh Megan! Are you really going to ... Have you ever...” Hiro asked, his excitement preventing him from actually finishing the questions.
Megan continued to kiss her way lower and lower. “Yes I am and no I haven’t,” she said, “but I’ve done my research so I’ve got a pretty good idea of what to do.” When her face bumped into the tip of Hiro’s penis she took it in her hand and held it straight up, looking at it with curiosity. “You know, ever since I saw that picture of you all naked and hard I’ve wondered what this would feel like.” She gave it a few strokes, causing Hiro to groan. “It’s hard, but kind of soft too. It’s so hot, and something about it just makes me want to...” Instead of finishing what she was saying, Megan opened her mouth and took him inside.
“Oh fuck!” Hiro swore. This really was happening. Megan was actually giving him a blowjob! And Karmi was right there, recording it! Feeling and seeing her wrap her lips around his shaft was electrifying and he had to grab onto the bedsheets so he wouldn’t just grab her head and face fuck her. If she thought his dick was hot, then her mouth was a furnace. It was so hot and wet and when he felt her tongue press against the underside of his shaft he swore he was melting. Then Megan started to bob her head and Hiro held on for dear life.
Mostly ignored in the excitement, Karmi stood off to the side, quietly repositioning herself so that her phone could capture all of the action. Even though she and Megan had talked for hours about this she was still worried that when they finally got to this point that she’d end up feeling angry or jealous at seeing her boyfriend with another girl. But there was no trace of anger at all and if there was any jealousy it was buried so far below her arousal that it was completely undetectable. If anything, she wanted to join in on the feast and help Megan drive her, or rather their, boyfriend absolutely crazy. However, this was Megan’s first time and she didn’t want to do anything that might take away from the experience. Once that was done though, then she’d definitely get hers, with interest.
If it wasn’t for the fact that Hiro had just come inside Karmi not that long ago, he would have already exploded in Megan’s mouth. Even so, he could already feel the churnings of another one beginning to form. “Megan, that feels so good!” he moaned.
“Guess that means my studying paid off, huh?” Megan said, taking his dick out of her mouth so she could speak. She then ran her tongue up and down the sides, tasting every inch of him that she could.
“It definitely did! But if you keep that up I’m going to explode all over your face.”
“Is there something wrong with that?” she asked, grinning up at him.
Hiro’s dick twitched at the prospect of seeing Megan’s face plastered with his seed but there was something he wanted even more. He shook his head and said, “No, but I want to, no, I need to be inside you, Megan. I can’t wait any longer.”
Megan smiled and crawled up on top of him. “Then what’s stopping you? You think you’re the only one holding back?” she asked before giving him a quick kiss. Looking him in the eye she said, “I want you to fuck me, Hiro. Now.”
Wrapping an arm around her waist, Hiro spun them so that Megan was suddenly on her back with him leaning over her. Quickly getting over the shock of their sudden shift, she smiled up at him and spread her legs wide. Heart pounding in his chest, Hiro took his dick in hand and lined it up with her entrance. They felt the bed shift and only then remembered that they weren’t alone in the room. Karmi had crawled onto the massive bed and was settling down near Megan’s head.
“Don’t mind me,” she said, still with her phone pointed at the other two, “I couldn’t see much from the side. From here I can see way better.”
Hiro couldn’t help himself. He was mere seconds away from having sex with another girl with his girlfriend right there watching, so he just had to ask. “You’re really okay if I-”
“Fuck her, Hiro,” Karmi interrupted, not bothering to let him finish. “I’m not just okay with it. I want you to have her. Show her what it really means to be one of Hiro Hamada’s girlfriends.”
Turning his attention back to Megan, he asked, “Are you ready?”
Megan wrapped a leg around him, gently pulling him forward. “Stop asking questions you already know the answer to,” she said, smiling up at him. Her entrance yielded to the increased pressure from Hiro’s dick, welcoming inside her molten hot folds. They both gasped at the sensation, so tight and wet, yet he easily kept going deeper. Hiro didn’t get very far before feeling something get in the way. With a reassuring nod, Megan said, “Take me. I’m yours.”
With only a little more pressure, and with a suddenness that surprised both of them Hiro burst through her maidenhead and sank all the way in. “Ahh!” they both cried, pleasure completely overwhelming any pain Megan might have felt from relinquishing her virginity. Hiro remained motionless, buried inside Megan as he let her get used to being stretched like never before. Though a haze of pleasure, Megan was having a hard time thinking, but one thing stood out clear as day, she wanted more. She had seen what Hiro had done with Karmi and she wanted that. Needed that. “So when are you going to do what Karmi told you to?” she asked when she could wait no longer.
“What do you mean?” Hiro asked.
“She said to show me what it really means to be your girlfriend. Well? I’m waiting.”
Hiro smiled at Megan’s eagerness and slowly pulled out about half way, then shoved back inside, causing her to moan in pleasure. “Is that what you meant?” he teased.
“Yes! That! Give me more of that!” she begged.
For the next ten minutes Hiro did just that. At times he was slow and gentle and at others he was fast and hard, but he never stopped moving and Megan thoroughly enjoyed every second of it. Soon the pleasure was so overwhelming that she could no longer form words but just lay there in utter bliss as he penetrated her.
The two of them weren’t the only ones having fun, though. Karmi couldn’t restrain herself any further, and like Megan had done earlier she began playing with herself as she watched the other two make love. Since she hadn’t reached climax from her earlier time with Hiro she was already feeling pretty close and knew she could finish herself off whenever she wanted. Trying to record the others while also pleasuring herself was a bit too distracting though, so she put her phone up on the bed’s headboard and angled it so it could capture as much of the action as possible. Then she really focused on the sex that was occurring mere feet away from her.
She knew from personal experience just how good Megan must be feeling right now, and if the sounds Megan was making were anything to go by then she was very close to coming herself. She squeezed a breast with one hand, gently pinching the nipple, and vigorously shoved two fingers into her needy vagina. Her guess about Megan was proven correct only a couple of minutes later, as the other girl began to moan and shake, a powerful but wordless orgasm coursing through her body.
As Megan came, the walls of her vagina squeezed even tighter than they had been already and Hiro’s tentative hold on his own climax shattered. “Megan!” he cried and shoved one last time as deep as he could go before erupting inside her.
Seeing Hiro and Megan having a shared orgasm was more than enough for Karmi to reach her own plateau as well. “Yes!” she yelled as her own orgasm burst forth, her fingers continuing to move as she tried to draw things out for as long as possible. Eventually her body could take no more and she flopped limply back on the bed, panting heavily.