"They're on their way here?" "What are we going to do?" "This is a disaster!" "Should we clear out?" "Maybe we can fight them off." "Could me make a new mutant before they get here?" "No, that'd take much too long." The various clones of Doctor Genus, leader of the House of Evolution, argued among themselves. Doctor Genus himself was going over the video feed once again. The cyborg Genos, while strong, had been no match for Mosquito girl and only barely surpassed Armored Gorilla. He was no real threat if it came to it.

But the dick girl hero.. Saitama.. she was an issue. Beast Queen broken in a single thrust? Unthinkable. Doctor Genus knew what needed to be done to save the House of Evolution. He held the head of the female non-combat mutant sucking his length down so he could unload down her throat, then stood up to address the clones, "We'll release Kabuto."

"What!?" "Are you out of your mind?" "She's too powerful, she'll kill half of us and break the rest!" "We could never control her!" "Silence!" Doctor Genus said, "We all knew this day might come. That hero is in the way of the House of Evolution. Everything we've worked for could be ruined. Is it not worth any risk to create the perfect humans? We will release Kabuto, and she'll obey because we still have one advantage over her. We still control whether or not she leaves the building."


"Big building." Saitama looked up at the solid stone building called the House of Evolution. After getting the info on the location from Armored Gorilla, they'd left their new broken pets to the harem. The others could help break them in while they were gone. "Should we bring it down?" Genos asked, taking aim of the massive building. Saitama shook her head, "Of course not. Think of everything that could be inside there? Taking it all out in one go would be boring."

"Yes Sensei, I see.." Genos said, following Saitama to the door, "But.. all your battles end in one quick motion as well, do they not?" "They do," Saitama admits, "And they started getting boring as hell. That's why I started forming a harem out of the monsters and bad guys I fought instead of just having Crabrante and Dark Fish. Way more fun with more around. Plus it isn't like the encounters aren't fun while they last."

Genos nodded, continuing forward with Saitama until they'd both entered the building. "I sense no sighs on life above ground. The upper floors are a trap. Everything's below." Genos said. "Good scan, let's head down then." Saitama said, going to the grate meant to be keeping them out and prying it off with one hand and revealing a staircase leading down.


"N-no, get away from me, get away, stop, st-ah!" The Genus clone shrieked as the massive mutant, bipedal but resembling a beetle, dragged him to her by his legs. The bullets he'd fired at her in an attempt to kill her before the doctor could release her had bounced off her shell like nothing. She tore through his clothing, leaving his feminine body completely exposed. She had him pinned on his knees with his ass in the air as she sank her futa cock deep into his tight, virgin ass.

Less than ten minutes of hard fucking was all the beetle mutant needed to completely break the Genus clone, leaving him a drooling mess on the floor as she unloaded a flood of pent up cum into his ass, filling him completely and painting his body. It'd been almost six months since the last clone had slipped up and gotten close enough for her to rape, and that one had been dead in a week.

"I see you've stuffed another of my clones. Feeling better Kabuto?" Doctor Genus asked calmly. "First time I've seen you since you deemed me unworthy of freedom, and that's all you've got to say?" Kabuto questioned, glaring at him. "You know I'll get strong enough to break out of here one day, and when I do, you'll be the first human in my harem."

"Funny you mention getting out of here, because that's exactly what I've come to offer you." Doctor Genus said, "We've got an intruder, a hero. Defeat her however you want, but leave her body in tact enough for study. Do that, and you're free to go, do as you wish to whoever you wish so long as you never get in the House of Evolution's way." He said.

"How do I know you're serious about any of this?" Kabuto questioned. "Would I be down here if I weren't serious?" He questioned back, turning to the door and walking towards the exit. He pressed the button on the wall to release Kabuto, letting her follow him out. She stared for a moment, not trusting it, but she supposed he did have a point, and so went through shortly after.


Saitama and Genos walked down the hall, hearing something approaching, fast. Genos stepped forward when they saw Kabuto and Genus approaching. He rushed forward with his booster, trying to knock her down before she got too close. He hadn't noticed her power until it was too late to stop, and instead of actually stopping her, he was knocked aside as Kabuto rushed into Saitama, forcing into the stark white testing room.

"The doctor really wants that body of yours for testing. Not sure what's so special about you, but beating you is my ticket out of here," Kabuto said to Saitama as she got back to her feet, entirely unfazed. "So, you're this places number one power house huh?" Saitama asked. Kabuto nodded, "Strongest, fastest, most durable, and the only futa." She said. Saitama grinned at this. Kabuto didn't have much in the way of curves for breasts, but her being a futa still made her appealing.

"Genos, take care of the doctor while I handle the big girl." Saitama said. "Yes Sensei." Genos said, boosting towards Genus as Kabuto ran towards Saitama tearing her clothing off and pinning her to the wall, slamming her massive fifteen inch cock into Saitama's ass and railing her against the wall. Genos crashed into Genus, easily overpowering the scientist and burning his clothing off without hurting him, revealing his feminine figure.

Kabuto moaned happily as she fucked Saitama, listening to the d-girls moans and thinking that perhaps she'd broken her already. She slammed in to the hilt inside of the D-girl, cumming hard into her. No need to hold out if she was already broken. Saitama sighed happily as she felt it, her climax firing hot seed over her chest as well as Kabuto's. "Not bad, is it my turn now?" Saitama questioned, not even remotely shaken by the fucking.

"How.. how are you not broken, or at least in pain?" Kabuto questioned. Saitama shrugged, "Just wasn't a very rough fucking is all." She said. Kabuto glared, and Saitama could practically see the steam coming off of her body in anger. "Oh you've done it now bitch. Just because you've pissed me off, I'm going to let you see my strongest form." Kabuto said, her hard brown shell cracking in several places. Her cock grew an extra five inches, her breasts growing to match Saitama's in size, and all her muscles growing in size as well as her shell turned from brown to blue and green, "Futadom Mode!"

Kabuto pinned Saitama back to the wall, forcing her legs behind the D-girls head as she slammed all twenty inches of her cock into her ass in one powerful thrust, pulling all the way back out to slam inside again just as hard. She smothered Saitama's face in her massive tits as she railed her, the force of her thrusts breaking through the wall she was fucking against.

Saitama fell to her back on the floor in the hall outside, Kabuto on top of her and fucking her as hard and fast as possible, threatening to smash through the floor as well. Saitama moaned loudly, even came again from the fucking, but after she did simply smiled, "My turn~" She said, throwing the massive monster off of her and pinning it on her fours, lining herself up and thrusting in.

Kabuto screamed as the force of the thrust sent cracks through her shell, bringing her to the hardest orgasm of her life. Saitama grunted as she continued to fuck her, the position slowly changing so Kabuto's member was forced into her own mouth by Saitama's fucking, making her swallow her own seed as she came every few minutes. Genos meanwhile had long since broken Genus, who had no super human endurance and had been broken and unconscious without him even needing to use any special moves.

"Nice work." Saitama said, carrying Kabuto on her cock, "first male in your harem. Let's go bring them back and see how the others are doing." Saitama said, Genos nodding as he picked up Genus, positioning him on his cock the same way Saitama had Kabuto on hers before following her sensei out of the building.