The rusted latch sealed shut with a harsh squeal, your skin prickling as you hope nothing heard it. Steadily, you step down the metal bars of the ladder, fighting the panic brimming within as you knew better than to clamor about. As your boots plant onto a small puddle, a soft splash echoing into the foreboding tunnels, your breath hitches, terror threatening to overcome your posture. Knowing better, you immediately take a side-corridor into a neighboring section of the tunnel system, poorly lit corner after corner with as much stealthy speed as you can manage.

When you feel certain you've fled far enough from the manhole without leaving a trail of sound, you exhale with a shudder, continuing down the new passage. The occasional artillery or I.E.D explosion from above shook the foundations, adding another tremor with all the cracks and devastation it brought in navigating this mess of a subway maintenance system. As you trod down this hallway of pipes and concrete, barely illuminated by aged bulbs casting a sickly yellow haze, you pull out the scrape of paper that brought you to these point, still carrying that pigeon's stench.

'Food, shelter, a place to help. COVER YOUR TRACKS. MASK YOUR SCENT. DO. NOT. MAKE. NOISE. Join us or end up like the rest of them.' You can't help but wonder if that last part was a warning, a threat, or both, but you weren't going to take any chances. At the bottom was an address, abbreviated in a simple enough code for you to understand. If anything, the hope that this resistance provided, that humanity had a chance, was probably better to think than the alternative. Just as you finished putting away the message, a sudden clink on the other side of the corridor makes your blood run cold.

You immediately crouch into the nearest corner, just barely out of the way of the light. Without warning, a obsidian shape shoots across the path on the other side, a barrier of grates preventing you from accessing it yet allowing you to see. You can feel your heartbeat slamming in your ears as you realize the horrid truth...

You are NOT alone down here.

The movement is just enough to betray you; whatever it was knew precisely where you were and what you were trying to do. The Ral'ugani Sucker, lurking in the shadows, hisses sharply before hurling itself across the path at your face. Instinct screams at you as you feel powerful arms lock around your shoulders, lifting you off of your feet with alarming strength as it pushes its impossibly wide mouth against yours. The air is driven from your lungs and darkness clouds your sight as a terrifyingly powerful suction overwhelms your entire face...

In pain, the alien releases you immediately as it rockets away to face you again with a menacing growl. Its imposing form is towering over your own diminutive human one, its chiseled muscles flexed and ready for battle. You can see now that this wasn't an ordinary creature; its skin was inky black, lacking hair or any visible features except for it's green lips glowing in the dark...

The blow was unexpected, and the Ral'ugani stumbles, dropping down to a knee. It lets out an angry grunt before springing back up again, its clawed fingers flexing ominously. You can see that it hasn't given up; if anything, it seems even more intent on catching and claiming you now...

The creature hesitates for just a moment, confused by your unexpected move... but its instincts kick as it thinks that its your head. Its green lips spread wide around your hard cock and with an angry hiss, it begins to suck powerfully. It grips the both of your tighs roughly, holding you still as its tongue swirls around your glans, driving you wild with pleasure and agony.

Your thrusts push deeper into its throat with every movement, the alien creature choking and gagging around your cock as it desperately tries to maintain a steady suction on you, still believing that it has hold of your head. Its green lips stretch impossibly wide, and the flesh beneath bulges outward in time with each of your thrusts, its tongue lashing against every sensitive nerve ending it can reach.

The sounds it makes are best described as a cross between an angry growl and sensual moans, though you suspect that most humans wouldn't be able to make heads or tails of the language.

The thought of swallowing you whole sends a surge of pleasure through the alien creature, driving it to suck even harder on your cock. It lets out an almost animalistic grunt as its tongue flicks against your sensitive flesh, eagerly lapping up every last drop of your cum. Despite its confusion over why it feels like only part of you is in its mouth, the instinctual satisfaction of hunting and feeding coursed through its body, driving it to consume even more of your seed.

The Ral'ugani's powerful suction makes it difficult for you to breathe properly, but the sensations running up and down your spine far outweigh any discomfort. With each thrust, you feel the alien's throat ripple against your cock, sending new waves of pleasure coursing through you.