OctoBoy

When he came to his senses he found himself encased in some sort of membrane filled with liquid. His first reflex was to try to claw at it, but for some reason his arms wouldn't obey him. He moved around and tried to bite the thing, he could now hear muffled sounds outside. He wondered how he hadn't drowned yet, but he managed to bite a tiny bit of the membrane and soon he saw fingers getting in and ripping it appart.

As soon as he was out he spat and coughed the liquid inside him, taking a breath of fresh air that felt like his first.

"OMG it smells like his room. At least you won't be able to tone police me when I call him a perverted freak." said Emily, with a grin on her face while taking pictures with her phone.

His mom who he'd have expected to hug him or confort him now that it was clear the serum didn't kill him was hugging his dad instead and crying profusely. His dad was trying to wipe his fingers on his pants without spreading too much of what was on them on the surface.

Suddenly the smell hit K-T and looking down he realized that what he was integraly covered in was was his own cum. He'd say that he was covered head to toes, but looking closer he could see that he no longer had legs, instead what looked like six sorts of tentacles were everything he had below the waist. Well, almost... In the middle of them was what looked like his ballsack would if it was made to contain a dozen of eggs.

Not seeing his dick while being naked for the first time made him look around and he followed one of the tentacles to its end and realized that it ended with the tip of a dick, they all did...

In a futile effort to remain decent considering his situation he tried to cover, his arms did obey him now but he soon realized that they too had changed. He had two extra tentacles coming out of his shoulders that ended in what looked like hands, except for the fact that each of the 4 fingers was a small penis. He was now trying to cover some of his dicks with more, smaller ones.

That was it. The serum had made him into some sort of octopus, dick, tentacle monster. He was used to almost always have the biggest dick anywhere he went, now it was a certainty with six of them as long as his legs were. Not ideal to get dressed, but at least he probably got powers to go with this and make it more bearable.