I just now ran into this image and it immediately reminded me of your Leyak submission.
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I really like this! And it was suggested to me that I put a few more scenes into this encounter before it gets in, so I decided to write this in. Feel free to chime in if you can think of other scenes you'd like to see for the leyaks.
For the Swarm! (Leyak wins Hypercock)
You stagger backward, the group swept out from your feet, leaving nothing but a rolling void. You hit the ground, or maybe a wall--it's very difficult to sort out dimensions at the moment, with leyak venom clouding your perceptions.
The one thing you're sure of is the fact that your massive {pc.cock} is rock-hard and throbbing. {Pc.clothes= "You hurriedly strip off your [PC.clothes], driven only by a hazy need for relief."} You fumble with your dick, but trying to manipulate your arms, much less your hands and fingers, through the cloud of psychedelic drugs is nigh impossible.
The world distorts in front of you, and you give up, whimpering as your turgid dick stiffens, rising {pc.cock length} into the air. You watch dreamily as a burst of living color circles your cock, trailing technicolor tendrils in a lazy spiral around your girthy tower.
It's the leyak. The thought bubbles up to the surface of your drugged-out brain, and you watch, bemused, as it alights on the head of your dick, pressing its jelly-like lips to your already-leaking tip. You gasp, bucking at the shock of pleasure that radiates down the length of your cock.
There's no warning as a jet of cum launches from the tip of your dick, spattering across the face of the leyak. It blinks, making a happy bubbling sound as it raises its tentacles to its face, scooping up your cum and shoveling your seed greedily into its mouth.
Meanwhile, you dick continues to leak a practical river of pre down its length. It might be the venom in your system, but you're pretty sure you're seeing movement at the corner of your vision. A moment later, you're pretty sure that your eyes have overloaded on venom, or there are a handful of new leyaks circling your towering cock.
It's impossible to count them, given the way that shapes are melting into each other right now, but you know you feel the lancing heat of at least three or four other kisses along the length of your {pc.cock}. You groan, gibbering at the sudden rush of pleasure and the nearly-painful hardness of your dick.
You hear several squeaking noises as the crowd of leyaks jostle each other, fighting for the opportunity to nurse more seed from you. A dozen tendrils wrap around your shaft, stinging you lovingly as they stroke you up and down. Between the touches, the lips, the constant influx of ecstasy-inducing venom, it's too much to take. You tense, then whimper as you feel the familiar tightening of your muscles before climax.
Except … climax doesn't quite seem to come. Instead, you feel the familiar pump of jizz down the length of your urethra, slower than it's ever been before. Each muscle contraction pushes a surge of cum down your length at a snail's pace, leaving you writhing in an exquisite agony, your moment of ejaculation stretched out for an eternity.
The leyaks grow more frenzied, eagerly slurping and licking at your slow-pour fountain, gobbling down your cum. Each one gets no more than a mouthful before it's pushed away by its fellows, leaving their translucent faces smeared with your jizz as they desperately kiss and gulp and suck at you.
You cry out, trapped in the sweet agony of your unending orgasm, shuddering while the flock of alien heads milk you with their venomous kisses. There's no way of knowing how long you lie there, head swimming with alien drugs, your towering cock serving as a feeding fountain for the leyaks. All there is is the terrible, glorious, unyielding pulse of your dick as you slowly feed the leyaks your seed.
When you finally finish, you're barely coherent enough to realize it. The leyaks seem to have wandered off, tangled in each other's tentacles as they bound off, wrestling with each other as they lick your cum from their cheeks. It takes an hour or so for all that leyak venom to wear off, and when it does, trickles of color still haunt your vision as you stagger to your feet.