Laura (23), Trina(25), Philip(24) and Jason(25) were near a stream. They were youtubers and used to travel around the country making videos in which they presented great places for those who wanted to relax, whether with friends or alone.
The quartet had gone to that location due to a suggestion by their subscribers and were relaxing a little while studying the place better before starting their live broadcast.
Philip and Jason were fishing while Laura filled some bottles with the water they would use later, including food and Trina prepared the fish caught by the guys. While they were doing this, none of them noticed the trio of shemale centauress who fucked each other not far from there. They also didn't notice when they came and the cum of one of them fell into the stream and ended up being bottled by Laura along with the water.
Laura barely finished putting the bottles of water in a tent with them, Trina has already taken one of them, which she used to make a grape juice with the fresh fruits that she had just picked up in the car, which all of them drank while they finished reviewing the material that they were going to present in the live broadcast that they would do in a short time.
An hour later they were live on their channel and according to the accountant they had 3,000 people watching at the time. During the presentation of the place when Trina fell suddenly, as the aetulations of her legs were changing rapidly and her shoes were destroyed by her feet becoming hooves. Her friends noticed and Jason, who was closer tried to help her, but he realized that the same was happening to him. "Guys, something very strange is going on here." he said, but it was too late.
By this time, Philip and Laura's feet and legs were also beginning to change, while Trina's had completely changed into back equine legs and were covered with black hair. Her pant legs had not been able to withstand the transformation of her legs and her garment was totally destroyed along with her panties when her butt also became equine and a tail above it. She was going into despair, but when looking at her friends she saw that everyone was going through the same transformation, only hers that was more advanced.
At this point they had completely forgotten that they were live. Trina felt a pressure between her legs, she looked in time to see her vagina disappear and the smooth skin in place darkened before a big ballsack appeared in its place, followed by a horsecock that was already hard when it grew up. Then two bulges formed on her hip and grew on her new front legs.
Having four legs now, the bottom of Trina started to stretch, at that time she heard Laura say " No, I don't want that. Anything but that." This caught the attention of the other people who looked at her and saw that a stick had just grown in her too, which Philip and Jason did not understand since their cocks had disappeared and now they had vaginas between their legs.
Soon the bottom half of Trina's body had become the body of a male horse. Soon she felt her bra tighten, having the crease destroyed by her breasts that grew 5 cup sizes. Realizing that the transformation from the centaur to her had ended, she watched Laura, Philip, and Jason complete their own transformations.
Having spent the longest 5 minutes of their lives the 4 youtubers were centaurs now and several people saw it all live on youtube.