When he looked in the mirror he saw his posture had shifted, his torso was narrower and a little hunched over. His chest had produced forward and his pelvis looked thinner. “that's odd...” he said but when he inspects his hands it dawned him, the rough palms had stretched and the fingers became stubbier while the thumb had shrunken, “fuck I'm shifting full, that's not what supposed to happen and that's not what I wanted...” he said while walking over to the vial. He had drank only half of the content, cause he wanted the anthropomorphic look. He opened the package and found the liquid in the vial had changed color, from clear blue to a milky white. When he unscrewed it, it doesn't smell fruity anymore, more like old socks and rotten food.
He decided to look into the FAQ forum from the website. He had trouble using his laptop with his changing hand and even sitting was hard cause his growing tail was not supposed to sit on. With some effort he found a helpful entry, it says “...trying to safe some content for a partial or second transformation is unnecessary. Once opened, the content will spoil within hours and the process will always go full, no matter how much is consumed. Its also designed for one person so there is no use for group transformation wit one vial....” Nate sat back on his chair “...OK that's changing my plans...”. At first, he was shocked, but it was quickly replaced with excitement. Become a full feral wolf was also a great desire and now he wanted it more than anything.
His cock sprung back into his view, and Nate began stroking it again. It felt more sensitive and longer, when he inspects it closer he saw its tip had shifted to a pointier shape while the base looked bulbous and also a second furry skin had developed on it. “Oh yeah its coming along well...” while he stroked himself and getting higher into temptation, he felt something moving under his seat. His growing tail began a life on its own and wags heavily. It disturbed him so much that he had to change on the ground. Stroking with one hand while playing with his tail. His stroking became faster and his panting louder, he couldn't sweat anymore, so his longer tongue moved heavily and drooled on the ground. The shifting hands cramp from the stroking and he had trouble to hold the grip while stroking faster, he wanted to cum so bad.
Nate came with a large amount of hot sticky semen which drooled on the floor. His shifted member pulsed hard and didn't stop cumming. The wave of pleasure overwhelmed his more animalistic brain with endorphines and so he howled in a long and deep tone, while still firing his load on the ground. It lasted some seconds, when he finally collapsed on the floor, totally exhausted from the pleasure.