With their final exams approaching Cory, Yara, Cindy and Dara would have their final exams in no time and were gathered in Yara's apartment for a study group in order to prepare for it.
While they were studying, there was a racket outside, which bothered them. Dara got up and opened the window to complain, but was totally shocked to see a giant hermaphrodite shark girl jacking off.
"What are you waiting for Dara? Tell them to be quiet soon." Cory said
Dara didn't respond, being stunned eyeing the shark girl who looked at her. She saw the giantess point her cock in her direction, but when she finally realized what was going to happen it was too late, the shark girl came and the cum flew towards her so fast and so hard that she didn't have time to get out of the way, being thrown back and falling on the table where they were her friends gathered, all white with the liquid she couldn't help swallowing.
The other girls were startled when they saw their friend fly over the table and looked quickly to the window, only having time to see the giant shark girl running carrying something, but before they could identify it disappeared from view.
"That creature... the noise was her masturbating.... she came right on me." Dara said, catching her breath after impact.
"She must be one infected with Mutation Liquid. You may have been infected too, I'll call for help right away." Cindy said and with her cell phone she called asking for an ambulance, but she was informed that it could take a while due to the outbreak. "They said that there is an outbreak in the region, it was recommended that we do not go abroad, but that we try to keep some distance from Dara in case she cannot resist the temptation to infect us too." She said after ending the call.
"Here is already contaminated with that mutant's cum, let's go to the bathroom." Yara said
"We'll leave you alone, hope you don't get mad at us." Cory said to Dara.
"Go, and better this way. I also don't want to infect you guys and I can feel that my mutation has already started. See for yourselves." Dara said and lifted her skirt, showing in one of the few parts of her that wasn't smeared with cum, where they saw her panties being stretched by the cock and balls that replaced her vagina.
Yara, Cory and Cindy isolated themselves in the bathroom, leaving Dara alone.
Dara felt she was already feeling the instinctive desire of the liquid and wanted to go after her friends, fuck the three of them and make them mutants too, but she resisted, putting her new cock out and starting to jack off to control it.
While jacking off, Dara hoped her mutation was over, but she kept changing. Her new cock and balls kept growing and, when it reached a foot in length, her breasts began to grow too. Her bra and blouse were totally destroyed by the growth, which seemed to have no end. Her dick reached 2 feet... 3.... 5... 8...12...15... and finally stopped growing when it reached 20 feet long, so did her balls and breasts getting gigantic as well.
In the end Dara observed her mutation, she was still practically normal, but although she had a dick and balls that were at least three times bigger than the shark girl that infected her, her breasts had also been, each one, at least two times larger than her entire body. In the post-transformation excitement she didn't care about the consequences, with her breasts and genitals occupying most of the apartment she stimulated them as best she could until she came.
As expected by her the amount of cum was absurd. The apartment was flooded with white liquid, unable to exit through the window that was obstructed by the giant balls, and at one point the bathroom door did not resist, being torn out of place causing the bathroom to be flooded with cum and covering the three girls who couldn't escape.
When her orgasm ended and she recovered, Dara was finally able to think rationally and seeing the amount of damage she called out to her friends, who didn't answer her right away. Only a few minuter later did an anthro three-headed dog swam and climb onto her cock, from where he looked at her.
The three-headed dog had three cocks between its legs, each with its own ballsack. She also had a wider torso contained a total of 16 breasts, 4 rows of 4 breasts each, as well as three pairs of arms, one under the control of each of them.
"Apparently we couldn't avoid being infected either." said the middle head, which by the voice was Yara.
"And look what we've become. Now the three of us will be together forever." said Cindy, who was the head on the left.
"At least we still have our three vaginas behind our balls." said Cory to the right.
"I'm really sorry girls, you guys got that way because of me." Dara said
"Don't worry about it, there's no way to predict what happens in a mutation." Cory said
"And we don't have much to complain about, your situation is worse than ours." Cindy said
"Now the biggest problem is how they will get you to the hospital. You won't fit in an ambulance with a cock and such big boobs, and you won't go through the door, either. It will be difficult to get you out of here." Yara said