You achieve much more than that.

Several days pass. The System has taken a sample of your blood with the intention of analyzing it better, but it has gone out of control. The evolutionary war within your blood has now spread throughout the world, The System unable to control your blood's reaction.

Life has exploded on the planet. All ecosystems are collapsing due to mutations and accelerated evolution. Technology is incapable of doing anything. Human beings have not escaped such a fate. The naturals were the first to evolve, but even the most augmented have not escaped the process.

Throughout the world, Titans have risen. Living creatures whose bodies regenerate at impossible speeds, capable of surviving the loss of their brains or hearts without a problem. Beings that have secondary brains and hearts for backup. Beings whose consciousness is encoded in their DNA, so their brain serves only as an organ necessary to fully function, so even if they lose it, it doesn't really matter.

One of these titans arose from natural humans. Their bodies are now fused together, like an abomination made of flesh. Even then, their consciousnesses have served to form the consciousness of the titan. It is powerful, as are all of its brothers. None of the Titans accept the technology in their bodies, but they don't reject it. They obey the System without hesitation. When two Titans meet, they fight to the ****, and the defeated Titan is devoured by its victor, who evolves in a process known as assimilation. Even then, the remnants of the devoured titan will eventually regenerate and bond again, having evolved as well, ready to once again fight its previous adversary or another.

Augmented humans have escaped the fate of becoming part of the titan, but not evolution. With the technology within them maintaining their minds, their bodies have undergone many changes. Some have acquired fleshy, mechanical tentacles, adapting to life in the sea. Others are half birds and have now taken to the heights. All, without exception, have acquired some animal or vegetable trait, and now obey the Titans. The System no longer controls them, whatever technology they possess obeys them now.

Your city still resists. It is the last human city in the world. Only you and some humans remain intact, although you don't know how long it will last. It is very easy to become infected, at least for others. Only you can escape that fate. The problem is that you are the most infectious being at the moment, since this strange mutagen comes from you. You could escape and spare them such a fate, but you won't. They don't matter to you. Nobody ever cared for you, you didn't even care enough for yourself and that hasn't changed.

Well, that's not completely true. She matters to you. She's the only one you care about. Your synthetic girlfriend. Except she's not synthetic anymore, at least not completely. You've turned her into The System itself, so she's just as infected as everything else. But your bond ensures that your blood does not taint or harm her in any other way. It has actually created a body for her, being a cyborg just like you. You are the only ones who will continue to live this way, but neither of you care. You only care about each other.

"Fuck yeah! I'm so close, babe!"

She smiles at you and kisses you. This time she doesn't stop her hips but speeds up, riding you faster. You explode inside her in no time as she herself squirts all over your abdomen and chest.

"Shit baby. At this rate we'll run out of space to hide my eggs."

"I don't care. They can't harm them. Besides, they're under your control, and even when they're out of control, they'll know I'm the strongest and they won't dare harm us."

Finished your explanation, you get out of her and **** her to kneel.

"Ass in the air, love. We're not done."

With a squeal of excited pleasure, she assumes the requested position. Her excited cry turns into a lustful moan as your cock enters her in one motion, your teeth sinking into the nape of her neck.

"Mine!" You growl against her neck.

"Yours, baby. Completely yours." She breathes in a **** gasp. "God, fuck me already! I need you, love. Give it to me!"

And just like that, the dominant girl who rode you and kept you on edge for hours becomes your submissive bitch. You do for her the same thing she did for you, slowing down each time she nears her climax. She curses you like a sailor, just like you did before, but you both know that she actually enjoys it just as much as you do. When you finally release inside her, she arches her back and opens her mouth wide, but doesn't scream, unable to express the pleasure that's overwhelming her. If she were human, she would have passed out hours ago.

"I love you." You whisper against her ear some time later. You're lying on your side, facing her, both of you moving your hips in a slow rhythm to get your cock in and out of her. Your arms and legs are tight around each other and your mouths often meet, sharing languid, loving kisses.

"I love you too. Do you want to cum in me or do you want us to slow it down for a while?"

Instead of responding, you slow down your movements and she does the same. You kiss with love and passion, sharing your feelings through this physical language, even if it is unnecessary. The two of you are connected, so your feelings and emotions are always felt by the other. Still, being able to express your love to her and hearing her response back is still something you both love. She kisses you again, simply because she can, and you kiss her back just as enthusiastically. You know from experience that this last orgasm will be different, and not just because you've had two before. Now you are making love, not fucking. You have already satisfied your physical need, now all that is left is the emotion, sex being a means to an end.

No. You definitely don't care about those humans. As long as you have her, the rest of the world can burn where you are concerned. Accelerating one last time, both of you share a loving look before joining your mouths. You tense in each other's arms, your cock swelling inside her cunt as her walls flutter around it. You plunge into her one last time, she thrusting her hips at the same time to engulf you in her depths. The head of your cock kisses her cervix the moment it opens to receive your seed. You throb and shoot inside her as her pussy sucks and milks every drop. Your kiss becomes even more passionate, sharing the same non-verbal communication. "Give it to me," her mouth pleads. "Take it all," yours replies.