At around 9:30, at the first few periods of the day, Mike arrived at school in his red speedo. His only class for the day would be his PE lesson, but he would still make the most of it. He walked into the change rooms whilst all of his year 10 class was changing into their sports gear. "Alright everyone, I wanna see you at the pool in 5 minutes, everyone in your school speedos or ELSE," Mike called over the noise. Grumbling, most of the class began to take off what sports clothes they had already pulled on. Mike walked to the pool at sat down and rubbed himself a little through his tight speedo. In 5 minutes, his entire class had gathered, all of them wearing shorts over their speedos till they could get in the pool, as the morning was a bit cold. Mike watched as a few shifted the speedos beneath their shorts and felt his own boner grow a little. They were all within range of the germs, he just had to keep them busy for a short bit for the fag germs to cover the distance.
"Everyone wearing their Speedos?" he asked. "Yeah," the class replied. Most of the students lowered the band of their shorts so Mike could see the school speedo underneath. Mike smiled as he watched what little hair the kids had immediately around him retreat into their chests. Also, he watched as those nearest began to develop a 6 pack and arms began to widen and become more muscly. "Are they the new Speedos or the old ones?" (The old ones never use to have BGS printed across the back) Grumbling again, the class all stood in a semi circle and pulled the waist of their shorts down below their ass. Mike made sure to stand near everyone to spread the Speedo Fag Disease. He grinned as he noticed a few of the speedos were already changing from royal blue to a bright red, and that all of the class was about as tall as him. His smile widened as half of the students let go of the shorts and let them fall to the ground without even seeming to notice. The ones who hadn't were the ones who were hanging around the back when class had started. They would soon change though...
All of his class except two or three were now in red speedos instead of the school ones, and all of these students now looked like they were 20 years old but also as if they had worked out constantly since the age of 15. Then it began. One of the students turned to another standing next to him and they fell to the ground kissing as soon as their eyes met. The rest of the class excluding the back row students followed suit, each rubbing each others' ass through their tight, well filled, red speedos. The last 3 who were still standing looked around in disbelief. Mike walked over to the first one on the left, and thrust his tongue down his throat. The student instantly tongued back and began to squeeze Mike's ass. Mike stopped him, as there was still 2 left. He moved over to the next boy, whilst the other boy he just completely changed moved to the 3rd. They both tongued their victim at the same time, and then slowly fell to the ground kissing and rubbing each other. The whole class had been converted and were all lying around the pool making out with each other in their red Speedos. The plague was spreading.