Rubbery, RGB Gengar TF (Patreon)

He was a not very popular, hobbyist streamer.
But on his birthday, he unexpectedly received a gift from an anonymous viewer.
Much to his delight, he began streaming at his usual streaming time in the evening, introduced the gift... a pair of strangely shiny, two-horned purple headphones, gratefully donned them, and began to play the game.
So focused was he on the gameplay, its play-by-play and the reaction from the viewers, that he did not notice that the headphones began to wriggle like a living creature.
A disturbing comment from a viewer finally made him realize something was wrong.
As he looked at his astonished face, the headphones dissolved like mucus and began to envelop his face and body.
The mucus seemed to react to his surprise and quickened its invasion. It transformed itself like a hand and began to expand its reach, gently but forcefully rubbing and stroking his body.
The caresses of the hand were very delicate and pleasant, starting with his head, rubbing his neck, chest, waist, and arms. It felt so good that he forgot he was delivering it and writhed and writhed.
But the mucus did not just envelop his epidermis. Soon, as his buttocks were squeezed forcefully, they suddenly swelled up like a compressed rubber ball rebounding, as if his buttocks were about to explode.
The impact sent him bouncing off his chair, his hips floating, but the other sensation... the overwhelming pleasure of his buttocks expanding forcefully made his whole body tremble.
In front of Stream's camera, his flesh mutated more and more.
His arms, legs, and torso expanded, his flesh fused with mucus and mutated into a rubbery substance, and his head also transformed into the simple shape of the original headphones, which grew two horns.
Viewers realized that this was not a CG production and began to post a series of astonished and excited comments. 
As word of mouth spread and the number of viewers exploded, he let out a winning cry, and his expanding body transformed into a strange life form with a purple sheen, scattering his torn clothes uncontrollably.
Finally, when the mucus envelops his penis, it immediately begins to expand just like his torso, and the bizarre pleasure of being kneaded from the inside causes him to immediately shoot his mucus... The camera lens is blocked, and the stream delivers only charming sounds and squeaky rubber.

A month later, at night.
He was floating in the hollow of the room. He then created a ghost hand that moved freely in the air with light concentration, separate from his own hand, and operated the PC with a completely familiar hand, starting the stream at the usual time.
The comments from his viewers, which had multiplied dozens of times, were no longer mere strings of text to the spiritual life-form...the Gengar, but a direct shot of mental energy. It felt like nourishment, physical stimulation... a caress.
His thick penis between his legs began to erect quickly, and he responded to the viewer's obscene requests while still holding the game controller...

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