The terra-dome of the Martian city was quite breathtaking, standing as an example of how far humanity had reached into the stars. The city had been designed to fit the style of old-earth Japan, though it was much cleaner in both style and literal lack of litter than its inspiration. White superplastic material formed the sidewalks, street lights, and almost all other surfaces except the many plots filled with lush greenery, giving the terra-dome a white and green palette. Hayate couldn't help but admire it, since entering the city was always done via an elevator that gave a breathtaking view of the city now in chaos as it descended. Now that the elevator had lowered itself between a few tall buildings, her sightseeing was over, and it was time for her to do her best to save the city. She stepped out, and checked her equipment before proceeding. Her space-age pistol was loaded and ready, with a selection of elemental bullet-types to switch on the fly. She also had a large combat knife, sharped to a ridiculous degree via laser. Finally, she checked her tight-fitting suit. She pinched her wrist, and instead of any kind of pain, a jolt of pleasure was sent to her sizable cock. With this tech, she was near invincible, at least as long as she didn't cum too much.
She pulled out a radio and called into HQ. "This is rookie Hayate! I've landed in the Martian terra-dome, and I'm ready to exterminate the threat!"
"Excellent. We have located the source of the tentacle monsters: The academy. Early visuals have confirmed monsters pouring out of it, scattering through the city."
Hayate felt excited to get to the exterminating part, and it went into her voice. "Alright! I'll head over to the academy and destroy them all, saving the city!"
"Yes, but be careful. We don't know the source of the monsters, so it could be a boss monster creating them." replied the voice, followed by the sound of static.
"I got it. Wish me luck, headquarters!"
Hayate stepped out of the landing building with the elevator, and onto the streets. Now that she was on the ground, she saw how the beauty and cleanliness of the street was defiled with the presence of lewd, wormlike monsters. They wriggled around aimlessly, tendrils coming out of their mouth. Some had two tails like an octopus, while others had four or six tails each. All of them were covered in pinkish flesh, making it hard to tell where one ended and another began.
Hayate raised her gun, pointed at the closest tentacle monster, and took aim. With a loud bang, a bullet flew straight through the monster, sending gushing alien innards flying out from behind where the bullet pierced. All the other monsters on the street snapped out of their absent wandering, and began to advance on the rookie.
One monster managed to get a swing in on the agent as she fought the crowd of monsters that encircled her. The swipe of one of its tentacles hit her leg, sending her tumbling backwards to steady her balance. She felt completely unharmed, but what would be radiating pain was converted into waves of pleasure. Looking down at her once-flaccid dick growing to quarter-mast, she reminded herself to be a bit more attentive, or one of the blows could be a bit too pleasurable. She stood and resumed the battle with fervor, the small lesson in damage-to-pleasure protection sitting in her mind as she diced away at the remaining monsters with her blade.
The academy was not too far west from her position, so she followed the road, battling corruptive tentacles as she travelled. Every few monsters, one would either get a grazing swing in, or latch onto her penis to suck it for a few moments before getting destroyed. The outcome for either situation was the same: A burst of pleasure sent directly to her groin. It was harder to fight when she was aroused, the throbbing of her cock always present in her mind. Even though she had trained for quite awhile in resisting arousal as it was a key factor in using the bodysuit, every time her nipples or dick was teased by a roaming corruptive lust-beast, the idea of just letting it fuck her for a little longer, or even until she came lingered. But she knew that if she did, the draining of her balls would come with the draining of her energy, and more enemies would gather to fuck her dick. It was a vicious cycle that had to be avoided.
The academy wasn't far out now. She could continue fighting in the streets, or slink along the alleyways and reach it with less encounters, with the potential of an ambush a bit higher. With her member now dripping pre-cum constantly at its full mast, she knew one bad move could push her past her limit. It's not like cumming once would be the end of her... perhaps the start of the end, and that worrying thought kept her safe from touching it.
In the end, she decided to