-S.T.A.R Labs-
A nerdy looking man in a lab coat approaches a middle aged woman, sitting in a chair and looking at archive footage of Hulk and Power Girl.
"Looks like Lex failed miserably, ma'am." The man said.
"Lex Luthor was an air headed idiot with none of our resources. We, on the other hand, have more than enough resources to deal with Power Girl." The woman says.
"That's all well and good, but what are we going to do with the Hulk, ma'am? Rumor is, he's even stronger than Power Girl." The man says.
"Easy. We lure him here, and reverse engineer his brain so he'll work for us." She says, smiling sinisterly.
"What if Power Girl tries to intervene?" He asks.
"Then we make her wish she was never born." She said as she looked at a strange restraining device surrounded by robotic arms, vibrating probes and cutting equipment.
-Power Girl's House-
Hulk is napping when Power Girl sneaks into his bedroom and lays on top of him, the awkwardness of Power Girl's betrayal put behind them. After hours of rest, Power Girl wakes up, still laying on top of Hulk, rubbing her hands along his muscular body, smiling. She liked how soft his skin felt. Hulk wakes up, enjoying the company of the buxom Kryptonian laying on him. He props his head up so he can look at her.
"Morning, handsome. Hope you don't mind. I got bored." Power Girl said.
"Bored, huh? So you snuck into my bedroom to lay on top of me as I slept?" Hulk said, pointing out the intrusive nature of Power Girl's teasing.
"Hey! Not my fault that you're so much fun to hang out with." Power Girl defended.
"Well...glad to be such a useful pillow." Hulk sarcastically remarked.
Power Girl giggled. "You're more useful to me than just a pillow, big guy." Power Girl flirted. Hulk smiled as he put his hand on Power Girl's back. Power Girl tensed up. "Hulk, what are you doing?"
"I'm touching your back." Hulk stated. He moved his hand away, but Power Girl stops him.
"No. Keep touching me. I like it." Power Girl said seductively.
The moment seemed to change as Hulk started tickling Power Girl, scribbling his fingers along her ribs. She started frantically shaking as Hulk dug into her ribs. She squealed before she started to scream in ticklish agony as she rolled off of Hulk, who continued the assault.
"Hahahahaha! Hulk, no! Don't tickle me! Ahhhhh-hahahahah! Hahahahahahahahaha! Stop, stop, stop!" She begged. Tickling was her greatest weakness, even if Kryptonite wasn't involved. Hulk reluctantly stopped as Power Girl breathed heavily, clearly exhausted.
"You're lucky that I don't hate you anymore. Otherwise I'd tickle you even worse."
"What?! Oh, that was cruel!" Power Girl exclaimed.
"No, it was funny." Hulk said as he smiled.
"Hulk! You know how ticklish I am!" Power Girl yelled, smacking Hulk on the arm. She tries to get up, but Hulk pulls her back.
"Come on. You know I wouldn't torture you. Unless you wanted me to."
"Grr! You're lucky that I love you. Otherwise I'd kick you out of here." Power Girl said as the two started kissing each other. She straddled Hulk and pushed him down as she passionately kissed him, moaning pleasurably.
"You are so beautiful..." Hulk said.
"Shhhh...I love you, Hulk. More than anything." Power Girl said. Before things could heat up, the TV automatically turned on, reporting a fire at S.T.A.R Labs. Hulk rolled his eyes.
"Worst time for a fire to start." Hulk said.
"Eh. It'll be over before you know it. Then...we can go back to this, and maybe even more fun stuff will happen." Power Girl teased as the two got dressed.
-City-
The two heroes headed to S.T.A.R Labs, Hulk leaping from building to building while Power Girl just flew there. Obviously, Power Girl arrived first, smirking in victory as Hulk smashed into the ground next to her, leaving a massive crater in the concrete where he stood.
"If you couldn't fly, I would've gotten here first." Hulk said as he unleashed a loud clap, extinguishing the fire on the outside of the building.
"Well, I could always carry you. I certainly could handle your weight."
"Don't make me tickle you again." Hulk playfully threatened. Power Girl raised her hands, scared that he might actually do it. Suddenly, the two heroes heard people screaming for help. The two rushed into the building, eventually ending up in a lab of some kind.
"This place is creepy." Power Girl said.
"What exactly does this place specialize in?" Hulk wondered aloud. A voice spoke out, making both heroes turn left, spotting an elderly woman and a geeky looking man in glasses.
"This lab is designed for genetic splicing. We've been trying to mix human DNA with Kryptonian DNA to make the perfect super soldier." The woman explained pridefully, obviously proud of her objective. "But...so far, all of our test subjects have died before they can adjust to their abilities."
"Something tells me they lured us here so they can run tests on us." Power Girl whispered to Hulk.
"Now that you're here, we may finally have what we need." The man excitedly said.
"Mmm...yeah, we're gonna pass." Power Girl said with immense sass.
She then tried to fly away, but a chain shot up and wrapped around her ankle. She then felt weak, falling to the ground with a loud thump. She sat up, immediately aware of what caused her to fall.
"Kryptonite, I assume."
"You assume correct, Kryptonian. Now for the big...whatever you are." The woman pointed at Hulk, who was kneeling next to Power Girl.
"I'm okay, Hulk. Just kill these assholes!" She told him. Hulk nodded in agreement before standing up, fists clenched as he growled at the two.
"Oh, I wouldn't do that. See, this building is powered by an atomic reactor. Even if it gets the slightest bit of damage, the reactor self destructs, obliterating everything within a blast radius of half the city. In other words, you smash, everyone dies, including your little girlfriend. Do as we say, and you both leave alive...eventually." The woman proudly announced.
Taking this into consideration, Hulk unclenched his fists and looked down in defeat. The woman smiled and pulled out a small remote, pushing a small red button. Power Girl screamed in pain as a strong electric current travelled through the chain attached to her ankle, eventually knocking her out.
"No!" Hulk screamed as he kneeled down and clutched the unconscious body of his friend.
"Don't worry. It was a non-lethal shock. She'll wake up in a few hours. Now, come with us, or she'll suffer worse." She threatened.
Hulk sighed. Despite his ludicrous strength, he didn't have a choice. He picked up Power Girl and carried her into the lab.
"Strap her to the table and get into the vertical capsule." The woman ordered.
Hulk reluctantly obeyed, strapping Power Girl to a table that restrained her in the spread eagle position before getting into a capsule that filled up with a liquid that made him sleep, finally reverting him into Bruce Banner.
"Subject fully transformed to its human state, ma'am." The man said.
"Good. Begin transfer of Kryptonian DNA into the cadaver we collected. Let's see if we can create new life for good." The woman commanded.
The man simply nodded before injecting a syringe into Power Girl's arm, collecting a blood sample and injecting it into a recently deceased human male. After a few minutes, the body's skin cells seemed to be repairing themselves. It then jolted upwards, it's muscles bulging before enlarging in mass. The body soon resembled the Hulk, only more human-like and possessed Power Girl's heat vision and power of flight.
"We did it. We created life!" The woman ecstatically said.
However, the test subject suddenly lashed out, punching the man in the chest, sending him flying. The woman ran to him, checking for a pulse. She couldn't detect one.
"I live again! Now you die!"
"Not yet..." She said before injecting Power Girl with an adrenaline shot.
She jolted upwards, breaking her restraints and tackling the hybrid creature to the ground before throwing it out of the building. She flew after it, punching the monster repeatedly until it caught her fist with one hand and grabbed her throat with the other.
'Come on, Hulk! Where are you?!' Power Girl thought to herself as she struggled to breathe as the hybrid monster slammed her into the ground before continuing to exchange brutal punches and throws, slowly spending their energy.
-S.T.A.R Labs-
Back in the building, the woman wakes up Bruce and injects him with adrenaline, forcing him to turn back into the Hulk. He tenses up, ready to strike her down, but she manages to calm him down.
"Look. I'm sorry about everything. There's a monster that's beating up your girlfriend. I released you because that thing will kill everything in the city. Go!" The woman yells.
Hulk simply frowns at the woman. "Don't make me come back here, or I'll smash you!" He then leapt towards the chaos-filled cityscape.
-City-
Power Girl is thrown through a building, yelling in pain as she was quickly sandwiched between two cars by her opponent.
"Ow! God, this guy is starting to piss me off!" Power Girl exclaimed.
Right as he was about to pummel the weakened Kryptonian, Hulk landed right on him, pinning him as he began punching his enemy deeper into the ground with amazing speed and ferocity, like a savage predator tearing into its prey. The monster kicked Hulk off, sending him into a truck, only for Hulk to hurl it into the hybrid beast. Power Girl uses her heat vision, blinding the creature before Hulk beats on it again, punching it at least twenty times before gripping its head and slowly pulling on it.
"AHHHHHH! WAIT! STOP!" The creature begged, screaming in agony.
Hulk ignored his helpless foe's begging. He hated to do this, but he knew he had to do it, or countless innocents would die. With one final pull, he tore the creature's head from its malformed body as it went limp, no longer able to function.
"HULK IS STRONGEST THERE IS!" Hulk loudly roared in victory.
He dropped the dismembered head next to the corpse of his enemy before inspecting Power Girl, who collapsed to the cracked concrete road, exhausted from the battle.
"Hulk..." Power Girl weakly said as she softly rubbed her palm along Hulk's face.
"Easy. You're tired. Let's go home." Hulk said before lifting her up and leaping back to her home.
Author's Note: You're probably wondering why Hulk's tussle with the creature was so brief. That's because it's extensive fight with Power Girl exhausted both combatants, making it an easy victory once Hulk arrived.
Next chapter will probably involve Power Girl being tickle tortured by Harley Quinn and the Joker while Hulk struggles with his feelings for Power Girl after meeting Zatanna for the first time. Hope you're enjoying the story so far!