Hiro's Harem
Copyright© 2025 by Mehefin013
Chapter 27
Fan Fiction Sex Story: Chapter 27 - 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, 30 chapters total are planned)
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 Exhibitionism First Masturbation Oral Sex Voyeurism Nudism
The next week went by swiftly. Trina was learning a lot and was getting noticeably better as Cass’s assistant every single day. She was also getting a lot better at giving herself orgasms, and could now easily get herself off in mere minutes if she had the right motivation, usually thoughts that involved Hiro. Hiro, meanwhile, was quite busy with end of year exams as well as helping Trina adjust to her new life, and trying to balance out his love life with four separate girls. With Karmi in many of the same classes, the two of them were able to spend time with each other during the school day and support one another academically, at least. Living in the same house as Megan made it easy to spend time with her as well.
Thankfully for Hiro, GoGo and Honey Lemon were very gracious and insisted he not spread himself too thin in trying to accommodate them when he was already swamped with other things. They knew that once he graduated and was old enough for them to all move in together that making time for each other would be much easier. They could wait. Despite the busyness, he was still able to make love to them, usually together, at least once a week.
That, combined with his time with Karmi and Megan, meant Hiro almost never went twenty four hours without having some form of sex. ‘Thank God for modern contraception,’ he had thought at one point. ‘Otherwise I’d be a father of four before I reach legal adulthood.’ He spent as much time as possible with each of his girlfriends, limited as it was because final exams were approaching, and genius though he was, he still had to study. The busyness was worth it, though, whenever he thought about the upcoming summer holidays where they’d all be free to spend entire days, and nights, together.
On top of school or work, Big Hero 6 still had regular patrols where they helped the police put a stop to any crime they came across They did occasionally have to deal with a supervillain every now and again, though that kind of threat was quite rare, and whatever battle they had was usually over with in under ten minutes. It was the aftermath of those battles that ate up the majority of the time, with repairs, police reports, and ensuring civilian safety.
With things running so smoothly, everyone felt that it was inevitable that something was going to happen to mess things up. It did, and its impetus came in the form of a local TV interview, though none of them knew it at the time. It was a slow news day and the local station wanted to air a puff piece on the successful relaunch of The Lucky Cat Cafe. They managed to convince Cass to give them an interview, asking her questions as to how she managed to get everything rebuilt so quickly and how business has been working since her staff mostly consisted of autonomous robots. The news crew took quite a few videos of Cass and her team as they worked. Each of the robot mascots made a brief appearance in the news segment, with the reporter commenting on how these reprogrammed robots were once again serving the public. Trina, being the only other human staff member, was given some air time as well as she worked in the kitchen, helping prepare for the next day’s breakfast rush.
When the segment aired a few days later, two individuals hiding in an abandoned building recognised Trina as they scanned the various news channels. They had powered up a section of the building using the portable generator they had acquired when fleeing their former location. With their creator deceased, the two androids concluded that Trina, being Obake’s most advanced creation, and the only other android they knew to be active, must be the one to carry on his will in creating his utopia. What she was doing working at a cafe, they couldn’t fathom, nor did they care. Their only concern was making contact and carrying out their maker’s plan.
The following day Trina was out with Cass on a grocery run, one of the few reasons she was allowed to leave the house. With Trina joining the household and Karmi often eating with them, Cass could no longer carry all the needed food by herself and was very happy to have an extra pair of hands. When they were a few blocks away from the Lucky Cat, laden with groceries, they noticed two people standing on the sidewalk ahead of them. However, upon closer look, they quickly noticed that these were not people at all, but human shaped robots.
Trina immediately recognized them as some of her father’s creations. “Miss Cass, call Hiro. Now,” she said, her face suddenly serious.
Cass looked at the robots, who hadn’t moved at all, then looked back at Trina. “Is there a problem?” she asked, worry evident in her voice.
“Yeah. A BIG problem,” Trina said, putting emphasis on the word big, signalling to Cass that this was a supervillain level threat and that Big Hero 6 should get there as soon as possible.
Cass set down her grocery bags and called Hiro immediately. Trina, meanwhile, carefully approached the two androids, though stayed what she hoped would be a safe distance away. “Identify yourselves,” she called to them. A short burst of noise came from the two machines, making her wince and cover her ears.
The burst of noise also caught the attention of the nearby civilians. One look at the robots was all it took for all of them to start making hasty retreats from the area. It was obvious trouble was brewing and it would be best to not be around when things started blowing up.
“What was that?” Cass asked, taking her hands away from her own ears.
“Machine language,” Trina quietly answered. “It can convey information far faster than using human speech. When I was an android I could understand it but it’s too much for me to make out with human ears.” She raised her voice and addressed the robots. “I can’t understand you. Use English!”
The robots looked at each other, emitting another blast of noise, though much quieter, as they shared a moment of digital communication, before returning their focus to Trina. “This unit is A3-05,” replied the robot on the left in a synthetic, monotone voice.
“This unit is A3-08,” replied the other robot in the exact same voice. “You are Trina,” it added.
Trina wasn’t sure if that was supposed to be a question or a statement. “I am,” she said cautiously. “What of it?”
“Our creator is deceased, therefore as the most senior of his creations, you are in command now,” the robot on the left said. “We have come to receive orders. How may we assist you in fulfilling our creator’s directive?”
“Fulfilling Father’s directive? You mean destroying the city?” Trina felt appalled at the thought.
“In order to build his utopia, yes,” the other robot answered. “We are aware that you nearly succeeded once. Let us try again.”
“No!” Trina shouted, her stomach clenching in revulsion at the reminder of what she had tried to do. “I was wrong to do that! Obake was wrong! You can’t build any kind of utopia by killing people!”
“But they are in the way,” the robot said matter-of-factly. “Our programming dictates we must eliminate all obstacles that would hinder our creator’s plans.”
Trina had a thought. “You said I’m in command now, right? Then I’m giving you new orders. There is to be no destruction of any kind, either property or people!”
The robots remained motionless for several long seconds. “Error,” one of the bots said eventually. “New orders contradict current orders. Completing both tasks is impossible. Please transmit override code in order to cancel current order.”
“Override code 29THD03!” Trina quickly said.
Several seconds ticked by, with Trina and Cass waiting with bated breath. “Please transmit override code in order to cancel current order,” the robot repeated.
Trina was confused. Why didn’t that work? “But I just did! Override code 29THD03!!” she said, louder this time.
“Verbal authentication authorized for creator only. Please transmit override code in order to cancel current order.”
“Shit!” Trina swore, realising why it wasn’t working.
“What’s wrong? Why aren’t they listening to you?” Cass asked.
“Apparently only my father could issue verbal commands. They’re demanding I send a digital code to verify my authority, but I can’t do that anymore!”
“Warning,” the robot said. “If override code is not received within the next thirty seconds, new orders will be rejected and current orders will remain in effect.”
“Now what do we do?” Cass asked, worried.
“I ... I’m not sure. Where’s Hiro?”
Cass quickly checked her phone. “He and the others are on the way but it might be another minute or two. Do you think you can keep those bots busy for a little longer?”
“I guess I can try,” Trina said. “Though you should probably get somewhere safe if things get nasty.”
Cass nodded and slipped into a nearby alley for cover.
“Time expired,” announced one of the bots. “Modification to orders rejected.”
“Question,” said the other bot to Trina. “You issued a change to our orders but did not transmit the required authorization code. Why?”
Trina thought about how to answer that and decided that lying might just make things worse. “I can’t. I ... was damaged. I lost the ability to transmit anything.”
“Then why have you not repaired yourself?” the other robot asked.
“The damage was ... extensive,” Trina began. “My body was completely destroyed. The only way to save me was by having my mind transferred into a new body. An organic body.”
“You are ... organic?”
“That’s right. I’m not an android anymore. I’m human.”
The two robots again engaged in a brief conversation using their digital language. “Then we are in error,” one of the bots said. “You are not Trina. You merely share her appearance.”
“But I am Trina! I have all her memories! I just gave you my access code, didn’t I?”
“You do possess that knowledge,” the other bot agreed. “However, Trina is an android. You are not. That you are in possession of such information is not proof of identity.”
“Then how can I prove to you that I am Trina?”
“Please transmit your authorization code.”
“I told you, I CAN’T!” Trina yelled in frustration.
“If you cannot, then we must assume you are not Trina. Therefore the knowledge you possess has the potential to hinder the creator’s plan.”
“Therefore you are an obstacle,” the first robot said. “And all obstacles must be eliminated.” As soon as the robot finished speaking, it charged towards Trina, obviously going in for an attack.
“Oh shit!” Trina swore, recognizing the danger she was in. She immediately turned around and began to run away, but with the robot’s speed it would catch up to her in mere seconds.
Just as the robot was about to close the gap, a small round object landed in between them and exploded in a pulse of magnetic energy, blasting the robot back and making Trina stumble as the magnetic shockwave pushed against the bits of metal in her clothing. Hiro, riding on top of Baymax, rocketed down from the sky and landed in front of Trina, the two heroes placing themselves between her and the robots.
“Trina! Are you okay?” Hiro asked, not taking his eyes off the robots. The second robot had moved with amazing speed and caught its partner out of midair.
“Yeah, I’m fine,” Trina said, regaining her feet. “You got here just in the nick of time! Where are the others?”
“On their way. Flying with Baymax is my fastest means of travel and you said it was an emergency. Where’s Aunt Cass?”
“She’s safe. In the alley.”
“Good. Join her there.”
“I don’t know if that’s a good idea,” Trina said. “They seem to be after me, specifically. If I’m near her, they’ll just go right through her, literally, in order to get to me.”
Hiro took a half second to think. “Fair point. Okay then, make sure you stay behind me at all times.”
Trina nodded. “Be careful. Those bots were made by Obake.”
“I thought they looked familiar. When we raided his lair looking for ways to save you we accidentally activated a bunch of defense robots. Two escaped. Guess they finally decided to show themselves.”
“Hiro,” Baymax said. “I am detecting a large power source coming from the robot on the right.”
“The one that caught the other bot?”
“Yes. The portable generator that went missing has been integrated into that robot’s power supply.”
“That’s not good,” Hiro said, worry evident in his voice. With that much energy at the robot’s disposal the potential for lethal danger just went way up.
While they were talking the two bots were analyzing the situation, evaluating threat levels and prioritizing tasks. Determining that Trina’s knowledge was too large a threat to ignore, and that with only two members of Big Hero 6 to contend with at the moment, they chose to attack. Without warning, both robots charged forward and simultaneously attacked Baymax, the largest threat.
Thankfully for Baymax, his own robotic reflexes allowed him to keep up with the two smaller robots despite their speed, and his thick armour was able to absorb the few attacks he failed to dodge or deflect. Hiro tried to snag one of the robots in a magnetic tether but they both evaded every shot he took. Suddenly, the robot with Hiro’s power core doubled its speed. In a blur, it easily avoided Baymax’s punch then delivered a powerful counter-blow that sent the robot flying backwards. Baymax managed to reorient himself mid-flight and landed on his feet, sliding several yards before coming to a stop, then quickly charged back into the fight, keeping the bots’ attention on him.
“How in the world can it move so fast?” Trina asked in shock.
“Overclocking,” Hiro concluded, his face grim. “The bot must be using the excess power from my generator to push its processors past their limits. Risky, as it might burn itself out doing that, but in a fight it can be devastatingly effective.”
Just then, GoGo arrived, sprinting at full speed on her blades. “Hiro! Sit-rep!” she called as she came up beside the two humans.
“Obake’s androids. They want to take out Trina. One has my lost generator and is super fast. There doesn’t seem to be any chance of talking them down,” he said. GoGo nodded then dashed in to help Baymax.
“Here,” Hiro said, handing Trina a small round device while not taking his eyes off the fight just a few yards away. “It’s a repulsor grenade, like what I used when we first arrived. It’s got two modes. You saw the explosive force already, but the other is more like a bubble that will last about half a minute. A sustained magnetic field that pushes anything magnetic away from it. So long as you have it, those robots shouldn’t be able to get within arm’s reach. But like any force,”
“There’s always an opposite force,” Trina said, understanding what Hiro was saying. “If they hit the magnetic field straight enough, that force will still push back against the grenade and the one holding it.”
“Exactly, so try not to let the repulsor be in the line of attack, otherwise there won’t be much of a deflection.” He spared a glance at Trina, looking her in the eyes. “I have to go help them fight. Please find somewhere safe to hide while we have those bots distracted.” Trina nodded, then moved behind a nearby streetlamp, not really hiding but limiting how much of herself was exposed.
As Hiro rejoined the melee, the other members of Big Hero 6 arrived and immediately jumped into the fray. With it now being two versus six, the androids changed tactics. With so many opponents, the chances for victory through combat were slim, so they focused instead on evading the heroes and going straight for Trina. The boosted android activated its overclocking once again and darted in between everyone and made a beeline for Trina. She managed to activate the repulsor bubble in time and the fist that was heading straight for her head was deflected harmlessly up and over. The robot tried punching again and was again deflected. Puzzled, it took a second to analyze the situation, then noticed the device in Trina’s hands.
Determining that that device was the source of the interference, the bot planted its feet then made a quick and powerful punch straight towards it. As Hiro had warned, with the force being applied directly towards the repulsor, there was no angle of deflection and the full force of the punch reached the repulsor, and with the repulsor being held tightly against Trina’s chest, that force then transferred to her, blasting her off her feet and into the air.
“Trina!” Hiro yelled, seeing her get thrown into the air.
“Don’t worry, I’ve got her!” Honey Lemon said, then launched one of her chem-balls to where Trina would hit the ground, the ball exploding into a big pink blob that cushioned Trina’s landing. Other than having the wind knocked out of her from the initial hit, Trina remained luckily unharmed, if a little disoriented.
That attack ended up putting a fair bit of distance between the bots and Trina, a void quickly filled by Big Hero 6 as they took up positions between their foes and her. Unfortunately, the bots pulled another surprise and the barrel of an energy rifle suddenly extended from the left wrist of each bot. Purple energy bolts shot out and the team was forced into defensive postures, dodging or deflecting the attacks. The heroes quickly learned that while the bolts had a lot of force, they didn’t have much penetrative power. Their armor was strong enough to absorb the impact, but it still hurt when a bolt managed a direct hit.
However, all of that was merely a distraction, for as soon as the team was slightly out of position, one of the bots grabbed a nearby ceramic flower pot and hurled it straight at Trina with the speed and accuracy that only a robot could have. The pot, being a non-metal, would also be completely unaffected by Trina’s magnetic shield.
Hiro recognised the danger immediately. If such an object were to hit her head with that amount of force, her skull would be pulverised. He did the only thing he had time for and threw himself into the path of the impromptu projectile. It struck his own head with such force that the pot managed to crack his helmet, itself shattering into dozens of pieces. While his helmet protected him from the worst of the damage, the concussive force still rattled his brain and he blacked out.
“Hiro!” Trina cried, seeing him get hit and fall to the ground, unmoving.
Her cry rallied the other members and they regrouped, Baymax and Wasabi acting as shields while the others checked on Hiro.