The airborne Leo virus was released on a calm sunny day, one where many ordinary events were taking place. For instance, the middle school girls' soccer team, aptly named the Wildcats, were practicing when the virus reached them.
The soccer players raced up and down the field, keeping up with the ball. Their usual coach was too busy with other things to come today, but her daughter Sara was able to fill in for her. Sara was only 18, just a few years older than the girls she was coaching for. Still, she was more than capable for filling in for her mom. She just wished it wasn't such a hot day as she wiped some of her short brown hair away from her face. Eventually, she blew her whistle and said, "Ok, girls, water break."
The girls hurried over to the bleachers and started gulping down water. All that running built up a big thirst. Sara was pleased with how the team was doing. Everyone was putting in their hardest, especially their MVP. Nancy was easy to spot on the field and it wasn't just because of her long honey-colored ponytail or the fact that she was the most developed girl on the team. Nancy was easily the fastest and could deliver the strongest kicks. Even when she was taking a turn at goalie, she was near unstoppable. At this rate, the Wildcats would win the league with no problem.
However, the soccer league would no longer matter as the Leo virus reached the soccer field. No one noticed anything until everyone started coughing. The coughing fits didn't lessen, in fact, they started to become deeper. The girls groaned as changes started coursing through their bodies. Tawny fur start sprouting over them as the unnecessary body fat reduced a lot. They groaned with discomfort as their fingernails and toenails were replaced by retractable claws. The pain got worse when their soccer shoes got too small for their rearranging feet. Some of them were able to pull off their shoes, but most simply had their new digitigrade paws burst through. Compared to that, the discomfort of growing tails or having their faces gain muzzles was nothing.
As quickly as it had started, the changes stopped, leaving several adolescent lionesses. The virus caused some of them to develop slightly, though all had gained more muscular builds. Sara was still the largest among them, her clothes stretched across her curvier frame. She sniffed the air before saying, "Ok, girls, new exercise. Let's go stir up some game." The girls gave cheers and roars at that, their new leonine instincts guiding their actions. The mutated Wildcats started prowling for worthwhile prey.