First contact
Deep space, during the space year one hundred forty six. Humans have expanded far and wide throughout the galaxy. Despite searching quite a bit, humans have been unable to find any other intelligent life. But now, on one of the scout ships that are patrolling the edge of the galaxy, we are about to have a few uninvited guests.
The day went like normal on the scout ship Izuka. The pilot kept us on course while the rest of the crew ether spending time in the rec room, or were doing maintenance work.
"These patrol missions are always so... Boring." Alice, our gunner let out a exasperated sigh as she beat her favorite video game for what seems like the millionth time.
"Honestly? i sort of enjoy this." Dan, our mechanic was sitting back on the couch, eyes half closed behind his long dark brown hair.
"I agree with Dan, Its nice being on a mission where we aren't getting shot at constantly." i smile warmly. I was the ships doctor, Dr. Ben Nala.  
the intercom crackled to life. "Guys? somethings up with our scanners." Our pilot, Jessica, sounded quite worried. "I'm picking up... Something moving towards us in an erratic pattern"
Dan sighed. "Must be the coupling connecting the scanners to the outside of the ship. I'm on it." Dan gets ups and quickly leaves the rec room, grabbing his tools as he runs by them.
Alice rolled her eyes. "I'm going to have a shower." She gets up and gos towards the shower room.
I just sat down, sighing lightly "So much for a quiet patrol..."
In the shower room, Alice had taken her clothes off and had stepped into the shower, turning it on and adjusting it to the right temperature. Suddenly the ship rocks slightly.
"what the hell...?" Alice was freaked out. She opens the shower door quickly, trying to reach for a towel. Then she saw a pink alien in front of her. She was face to face with it. She tried to look away from the aliens eyes but it was too late. She thought no more. Her eyes completely white. She was now nothing more than a mindless slave.
"W-what the...?" the alien's gentle voice sounded confused as shi touches the side of hir helmet. "Mistress, it seems the humans aren't as resistant to mind control as we first thought. This first one has become completely mindless."
Mistress spoke gently. "Look deeply into her eyes, find the fragments of herself and put her back together."
Shi nods gently. "Yes mistress."
The alien looked deeply into Alice's mindless eyes, piecing her back together amazingly quickly. As Alice comes back she tries to look away again but it doesn't work. The alien manages to keep her gaze. She feels millions of voices speak into her mind all at once, each voice speaking very gently and in a loving tone, telling her to submit. Alice tries her hardest to resist, for the first five seconds at least. Then a huge wave of otherworldly pleasure washes over her.
"Please get on your knees and suckle my member~." The alien spoke hir order gently and the voices in Alice's head repeated that order. She obeyed immediately, going down on her knees and suckling on the tip of the aliens member. A small moan escaping Alice's lips from the surprisingly yummy flavor.
The alien smiled warmly, petting the back of Alice's head. "Good human~." Alice whimpered weakly, feeling the voices in her head order her to suck more deeply. She obeyed, sucking the aliens member even harder and more deeply.
"lick the tip nice and deeply." The aliens orders continue to be gentle as shi pets Alice softly. Alice continues to obey happily, licking in a small circle on the tip of hir member.
"T-that's it, just a little more" The aliens voice was shaky since shi was close to climax. Alice began to lick and suck even harder and faster, still looking deeply into the aliens eyes.
"A-ah~! d-d-drink it all up~" The alien moaned out in pleasure as shi flooded Alice's mouth with hir cum. Alice moaned cutely as she does her best to drink up every last drop of cum she can, her mind going blank suddenly for a few seconds. Alice blinked as her mind came back to her again.
"Such a good obedient human~." The alien slowly pulls back gently, pulling hir member out of Alice's mouth gently. "You are my good obedient slave now, right?"
Alice nods shyly as she gulps down the last of hir cum. "Of course mistress."
The alien smiled warmly. "Then please get on the floor, legs spread nice and widely."
Alice obeyed immediately, laying down and spreading her legs. "What does mistress want to do?" She spoke cutely.
Shi smiled "I want to show you levels of pleasure you've only dreamed of my sweet human~" Alice quivered in anticipation, spreading her pussy softly. Just as the alien pushes her sizable member into Alice's waiting pussy Dan walked in.
He nearly jumped out of his skin. "W-w-w-what the hell?" As he turns to run away another alien teleports into the ship directly behind him. Before he is even able to react this alien manages to look deeply into his eyes, the spirals slowly spinning in hir eyes. He tries to resist at first, but it's hopeless. The millions of voices speak their orders as he stops resisting completely and kneels. the alien smiles, giving the same order the other alien had given Alice and he obeyed immediately. He even drank down every last drop of cum shi gave him, making him into another slave.
The alien spoke cutely. "Lets go into the bathroom my good sweet human~." Dan nodded, following his mistress into the bathroom where he was gently ordered to get on the ground beside Alice. He obeyed happily, letting the alien ride him, hir alien pussy feeling amazingly tight around his member. Both Alice and Dan moaned out in pleasure with their mistresses, all four of them climaxing together. Dan noticed his body beginning to change first, a pair of plump breasts slowly growing into place on his chest and a wet slit replacing his balls. Alice noticed her changes after she came down from the high of her climax, looking down to see a decently sized member had grown just above her clit which was extremely sensitive. Alice found out it was extremely sensitive from hir mistress stroking it suddenly. Dan and Alice's mistresses smiled as they tested out the new additions on their slaves, making them moan out over and over again, climaxing them into unconsciousness.
Meanwhile I was walking through the ship. I found it odd that Dan hadn't come back from checking on Alice yet. Then I heard the intercom crackle to life.
"I-it looks like we have another ship attached to ours." Jessica sounded abit scared.
I responded calmly. "Any idea whose ship it is?"
She responded quickly. "I don't think its a human ship..."
I let out a gentle sigh. "Aliens don't exist Jess, maybe its just some new scout ship or something?" I wait for a response. The few minutes I wait pass very slowly, the ship eerily silent. No response was coming. I ran towards the ships control room. Just as I move to open the door I hear Jessica moan out in pleasure along with another voice I didn't reconize. Then I felt a gentle hand on my shoulder.
"Hi~." I jumped, but decided not to turn around. Instead I looked down and back, seeing a pink leg.  
Shi sounded abit worried as shi spoke. "Um... Hello?" The alien tugged on my shoulder softly. I remained completely still. This alien was much stronger than me and most likely could break my shoulder just by squeezing it.
Shi spoke again very softly. "C-could you please turn around?" Shi hugged me closely from behind. I blushed gently at this. Shi was strong enough to just force me to turn around, but instead shis asking me to turn around and hugging me. Suddenly I feel hir hand slowly diving down my pants, grasping and stroking my member softly, a quiet moan escaping my lips.
Shi spoke again. "Please turn around and look into my eyes? I promise it wont hurt or anything~." I felt her lick the back of my neck softly as she stroked me more quickly, hir other hand pulling my pants down as hir tail comes up between my legs. I try to think of something to say as I pant softly from hir attention. Then hir tail softly begins to rub the tip of my member, hir strokes becoming abit faster. Shi pulls me closer to hir as shi hugs me, her tongue slowly working its way up to my right ear. My head swam in pleasure as my panting became deeper, each of hir strokes rubbing me just the right way. Hir tail rubbing with just the right pressure as it becomes covered in pre-cum.
Shi whispered gently into my ear. "Turn around and I'll show you a whole new world of pleasure." Then shi nibbled on my ear gently, sending a shiver of pleasure down my spine. Very shyly I begin to turn around, keeping my eyes shut from the embarrassed feeling that shot through me. Shi giggled as she continued to stroke my member deeply, hir tail rubbing the tip harder, my panting getting much deeper. Once I fully turn around shi hugs me closely, making sure to stroke me even harder as shi kisses my neck.
"Please open your eyes?" Shi spoke very cutely, stroking my member even faster now. A soft moan escapes my lips, which gets interrupted by a sudden kiss from the alien. Hir tongue gently working its way into my mouth.  I blushed like mad, very shyly kissing back as I feel her tail suddenly wrap around my member, stroking it faster as she hugs me tightly. Hir tongue tasted sweet as I sucked on it softly, feeling her saliva slowly drip into my mouth as I swallow. I felt hir tail stroke even faster as a burning desire to submit appeared in my mind, drowning out my other thoughts. It was like shi could feel that desire as she kisses me even more deeply. Hir tongue feeling like it was going down my throat abit as I sucked on it more deeply. Suddenly shi pulled back from the kiss as shi spoke.
"Please open your eyes sweetie." Shi spoke in a loving tone, hir tail working my member even faster. The only reply I manage is a moan as I open my eyes, looking deeply into hir's. My panting getting faster as a slowly spinning spiral appears in the aliens eyes. Suddenly but very gently I feel a presence enter my mind. It spoke with a million gentle voices.
Submit.
Each voice repeated that word over and over again in a gentle loving tone.
Submit.
I feel my knees grow weak as I kneel in front of the alien, my eyes never leaving hirs. Hir tail still stroking me softly.
Suck and lick hir member.
I obeyed the voices, taking hir member into my mouth as I sucked gently, dragging my tongue against the tip slowly. The flavor causing me to let out a gentle moan. 
Suck more deeply please?
I dully realize that shi is giving me orders now as i suck more deeply on hir member like she ordered me to.  Shi slowly began panting, a few small moans escaping hir lips.
Harder licks please, my sweet human?
I lick harder on the tip of hir member, feeling a strange kind of joy from obeying hir every command. Hir moans slowly getting louder and hir breathing becoming more labored. Hir tail still stroking my member nice and deeply as I moan against her member.
D-d-drink every last drop~.
Hir voice was shaky from being so close to climax. I suck hir member even harder, licking in a small circle on the tip of hir member.
Shi moaned out cutely. "I-I'm cumming~!" Hir cum flooded my mouth as I struggled to drink down hir yummy seed like I was commanded to. I just barely managing to drink down every last drop before my mind went blank. When I came back I felt a little different. As I looked up into the alien's eyes I felt a deep seated urge to submit and obey that caused my body to shiver in pleasure. Hir tail gently pulling away from my member.
Shi slowly pulled back, pulling hir member from my mouth as shi spoke. "You are my good little slave now, right?"
I blushed hotly as i responded. "Of course mistress."
Shi smiled warmly down to me as shi spoke again. "Then please lay back." I obeyed immediately, laying back as shi climbed on top of me. Hir dripping pussy juices covering my member as shi slowly lowered herself down onto me. Shi let out a soft gasp as hir pussy touched my member. I let out a gentle moan, feeling how amazingly tight she was just from touching her pussy. Shi hugged me tightly as my member slowly penetrated hir. Hir slick tight walls squeezing my member tightly. A small gasp escaped my lips that joined with hir gasp as I felt my member get all the way inside. Then I felt hir hands gently rub up and down my back as shi rode me softly, only going up and down abit. The pleasure caused me to buck my hips into hirs gently. Hir moans slowly getting louder as shi rode me harder.
I let out a weak whimper as I spoke. "A-ah~! I-I'm already s-so close mistress~!" I felt ashamed that I was going to cum so quickly.
Shi just smiled at me as shi rode me even harder. "Then cum my good little human, cum for me~!" Shi moaned excitedly. I felt my shame disappear as I climaxed hardly, shooting plenty of my seed deep inside my mistress. I blushed like mad as I realized that my mistress had cummed as well, feeling hir tight pussy squeeze me with each pulse of my member. I clinged to my mistress tightly, feeling my body slowly change. Breasts slowly growing out of my chest, part of my manhood disappearing into a nice, tight and very wet slit. Shi held me tightly as my body changed, petting me softly. Mistresses tail softly rubbed my new slit gently, causing huge waves of new pleasure to assault my mind as I moaned out cutely.
Even my voice had changed. "M-mistress~ a-ah... t-that feels so~ Mmm~." My voice was so much more feminine now.
Shi giggled gently. "You are so tight." shi slowly pulled back, lining hir member up with my pussy, and my member up with hir pussy. I felt hir penetrate me as i penetrated hir, my mind fogging as I struggled to comprehend all of the new sensations. I don't know how long my mistress rode me, or when I passed out. All I knew was pleasure that blurred out everything else around me.

When the crew woke up, they got back to their normal jobs. Their new mistresses following them around, doing their best to help their new slaves out with whatever they could. Each of their mistresses asked their names, spoke with them for a while, and outlined how things would go now. Basically it was business as usual with the occasional milking and intense sexual experience.
Eventually that scout ship reached one of our colonies, hundreds more of the Alorians ships following it. They took the colony by complete surprise by having an Alorian teleport beside every human there. It only took a mere five minutes for them to enslave everyone. The few recordings that were sent to earth from that colony showed the Alorians accidentally breaking people and turning them into mindless slaves. Yet the recordings didn't show the Alorians fixing the humans. Mainly because an Alorian ship had accidently bumped into the colony's comunication tower before that happened. 

To be continued...?