In an underground lab sirens where blaring as the chemicals they were working on leaked through the entire lab and started to escape into the air slowly but surely spreading out to infect the whole world.
The lab was run by 3 horny women who wanted to turn the world into Slutty quad-breasted dragonesses, they had created a chemical to achieve that but they weren't ready to release it into the world. Their plan was to infect the world's air and water to turn everyone except themselves into Slutty quad-breasted dragonesses. Their plan was to be the only ones able to fuck and breed the dragonesses, they had given themselves fully functioning cocks, they were herms now. They knew it would turn the target into an anthro dragoness, but it wasn't perfect and so their might be some mutations like more then the 4 breasts that they wanted and or a male victim retaining their manhood, or even multiple pussies.
The 3 women were a bit sad of the fact their work went out into the world unstable but they looked on the bright side that for the most part they will be getting what they wanted.
The 3 women in their hazmat suits made their way through the gas filled lab, since they were the only one working and operating the lab it was quite, except for the alarms. They shut of the alarms and went to were the chemical leak was located. The gas leak was coming from their testing chamber. They had until at this moment been using rats and pigs as their test subjects, they only now had decided to test on a human being.
The moment they came to the door they saw were the leak was. The test chambers door wasn't airtight, they women realized the company they hired was shit, but they also knew that what they get for hiring a cheap construction company. The chamber was of course empty since they wanted to test if it was gas tight and of course it failed.
Well they knew the gas would infect a human man first since they were going to test on a man first to see if it would change their gender correctly, so they decide to leave and track down the first person to get infected so they can watch and document the changes.
After a few days of using their special radars they find the first person infected.
From the info they gather the man is called Gabriel and he is an office worker.
The 3 girls are curios to see how he will change and if he will go on to infect other people. They definitely plan on taking turns impregnating him once he has transformed enough.