Author's note: This is my first take on the "girl strapped to a chair" type story. If the dungeon-porn style of MC isn't your thing, this might not be your story.
Mighty Girl had just enough time to marvel at the towering inferno as she descended through the atmosphere. The building was like a beacon, fire stretching high and bright in the night sky. It was breathtaking. Then Mighty Girl struck it at jet-speed, puncturing through like a bullet. She listened for the wailing noise from below, crashing through levels towards it.
"Help! Help! Oh god I'm going to die!" someone called from below.
"I'm coming," Mighty Girl shouted back, but she knew that the girl couldn't hear.
Mighty Girl used her x-ray vision to check the floors as she descended the skyscraper. The building appeared to be empty.
Mighty Girl wondered what had set the building ablaze so quickly. She had heard of the emergency and come immediately, but was already too late to contain the blaze. Something big must have caught fire and burned quickly. She made a mental note to follow up later. This had MaxCorp all over it. But right now, the priority was the woman below.
She was trapped in a subterranean lab—another thing to investigate at a later time. Mighty Girl dropped through the roof of the lab, landing with a flourish. The trapped woman was hiding below a table, soot and tears covering her face. The fire hadn't made it down here yet, but smoke was coming out of the bottom of the stairwell door.
"I'll save you," Mighty Girl declared.
Then, she felt it. It was that feeling of instantaneous weakness that she had learned to hate. Mighty Girl spun around, seeing the cloud of blue smoke pouring through the vents. It was an aerosol form of cryonite—the rock from her homeworld that supressed her powers. Mighty Girl looked above and saw the same cloud starting to pour through the hole she had made in the roof. She couldn't go back through there now.
Was this a cryonite production facility? Was that what had caught fire? Mighty Girl hadn't felt its effects on her entry, but there was no time to figure that out now. The gas was pumping into the room from every vent she could see. She had to figure out a way out quickly.
"I'll get you out," Mighty Girl said absently to the trapped woman as her eyes darted around the room. "Just stay calm."
Mighty Girl turned and saw the woman in front of her. She had emerged from beneath the table and was no longer crying. Mighty Girl had time for just a moment of confusion before the spray hit her in the face. A blue cloud with the familiar villainous scent filled her lungs.
Mighty Girl had just a moment to register that she had fallen right into a trap. Then, darkness.
When she awoke, she felt the cold metal chair beneath her and the familiar feeling of weakness. She was still under the influence of cryonite. She opened her eyes and saw two thick, blue, glowing shackles, binding her wrists to the chair. She could feel two similar cryonite shackles on her ankles and two more on her thighs, keeping her legs pinned to the chair.
Oddly, there was also a vertical pole sticking up from the center of the chair. It had bunched her skirt up so that much of her thighs were showing, but it was also impossible for Mighty Girl to position herself so she wasn't in skin-to-skin contact with it.
Finally, Mighty Girl realized with horror that someone had removed the underwear from beneath her skirt. The pole was pressed against her vagina, and no matter how she moved she couldn't get away from it.
"What sort of sick..." Mighty Girl muttered.
"Brilliant, I prefer," a voice declared. Mighty Girl instinctively rolled her eyes. Practice told her that a villainous monologue was coming.
Mighty Girl turned as much as she was able to in the chair. The room was relatively blank, but she could see a door behind her and a man standing in it. There was a faint beeping noise and the chair swiveled slowly. Mighty Girl knew she was in trouble.
It was The Controller who had her. The villain had made a career out of mind control, always declaring his desire for a "superhero pet". Mighty Girl's current predicament didn't bode well in that light.
"Hello Controller," Mighty Girl said, trying to project as much dignity as she could muster in her captive state.
"Hello Mighty Bitch," the Controller said with a grin.
That's original, Mighty Girl thought, resisting another eyeroll.
A girl emerged on the side of the controller. She wore tall heels, a net bra that hid nothing, and a thong. Around her neck was a thick collar with a red stone. It was a controller device, Mighty Girl knew. Mighty Girl shuddered to think of the "enjoyment" the Controller had gotten from this girl. Then, Mighty Girl recognized her. She was the girl from the lab in the basement of the fire. She was the bait that Mighty Girl had fallen for.
The Controller appeared amused by the expression on Mighty Girl's face. "Yes, we always can rely on you to go rushing into the fire to save someone. But I would never put my favorite toys in any real danger." The Controller felt the girl's breasts. The red stone on the girl's collar flashed briefly and the girl moaned in pleasure.
"You're going to pay for this, Controller," Mighty Girl said.
The Controller smiled and let his hand drop from the girl's breast. He approached Mighty Girl, his eyes freely exploring her body in a way that Mighty Girl didn't care for.
"I don't think so, Mighty Bitch," the Controller said. He reached out and flicked Mighty Girl's neck. There was a ringing noise and only then did Mighty Girl realize that she was wearing a collar of her own.
"You've tried this before," Mighty Girl reminded him, "on my cousin. Your technology doesn't work on my kind."
"Of course," Controller said with a shrug, "but I've modified my methods since then. Rest assured, we'll get this right."
"So what's the plan, then? Rape me?" Mighty Girl sneered to let him know it wouldn't that easy.
"Rape you? Of course not," the Controller seemed genuinely surprised. "When I fuck you, there will be nothing non-consensual about it. When I fuck you—when your choke on my dick, when I stuff your pussy, when I ride your ass, when you swallow every drop of my cum—it will be because you're begging me for it."
He smiled at her again and then turned back to the half-dressed slave. "Come on now, toy. Let's play. Mighty Bitch has some learning to do."
"Yes Master," the girl smiled widely, a sort of crazy excitement in her eyes.
As they left the room, he pressed a button on the wall. Immediately, the rod between Mighty Girl's legs began to vibrate. Much as Mighty Girl squirmed, she couldn't get away from it. She did her best not to enjoy it, but, as the minutes turned to hours, she didn't know how long she could hold out on that front.
Controller sat in the observation room, watching his captive heroine squirming as the rod vibrated her pussy. What she didn't know was that the blue stone in the collar around her neck was flashing slightly.
The Controller reached down and gathered a bunch of his toy's hair. He gripped hard and pulled her eager mouth off his dick with a pop noise.