"Happy Birthday, Asim!" Several of his seventh and eighth grade friends gathered in one of the residence hall bedrooms, circled around the short Indian boy who sat in front of a cake, having just turned twelve years old. For the first time in four years, he was able to celebrate his birthday on the actual day, February 29, and this made him very excited. Celebrating on the 28th or on March 1st just wasn't quite the same for him.
On the other side of the residence hall, where the high school boys stayed, the exact same thing was happening with Collin. A small group of friends had joined him, having brought a cake that looked very similar to the one Asim had, but with four more candles. Both boys ran in different social circles and had never met; the only thing they had in common was their shared birthday, the only two boys in the school who happened to be born on February 29th. Of course, all of that was about to change.
As luck would have it, they each were about to blow out the candles at the same time. And, whether through coincidence or fate, they both closed their eyes and made the exact same wish: "I want my life to become more exciting." Taking a deep breath, they each blew out all the candles in one blow.
As soon as the last candle flickered out on Asim's cake, he suddenly felt his whole body begin to tense up and rapidly start to expand. Before he realized what was happening, he was already eight feet tall, adding on a foot in height every second, his shirt and pants, then finally his underwear, stretching and then ripping apart. His friends fled the room screaming, leaving Asim stunned, confused, and naked, ten feet tall and getting bigger.
Collin's growth began only a split second after Asim's, as he had a few more candles to extinguish. Once it started, however, it was every bit as quick, as he too burst through his clothes, passing eight, nine, ten, eleven feet tall. He rose to his feet, only to thump his head against the ceiling and fall back down on his chair, crushing it into splinters underneath his now-ample posterior.
In less than a minute, both boys had filled their respective rooms, but their bodies wouldn't stop growing, as their heads pushed against the ceiling. Asim cried out, a little scared, while Collin had already begun to delight in his sudden and dramatic growth spurt, laughing and standing up to his full height, smashing through the second and third floors and then the roof above him.
After brushing the debris off of his body, the first thing Collin noticed was that, while the rest of his body stayed more or less within the same proportions, his manhood seemed to be be receiving a much more significant boost. Whereas before his cock was somewhere between six and six and a half inches, it seemed to almost have doubled those proportions, while each of his balls had grown bigger than his fist.
Collin thought about wrapping his hand around his shaft and seeing just what this new monster could do, but at that moment, he was distracted by something exploding out of the opposite side of the residence hall. He was somewhat shocked to see what looked to be the dark-haired head of another boy forcing its way through the roof, and then saw the boy's kneecaps, realizing that he was still seated. As more of the boy came into view, Collin realized that the other giant was much younger than he was, probably from the middle school grades. However, if he was also a giant, Collin reasoned, it probably wouldn't hurt to at least introduce himself. Stepping over the walls of the residence hall, he walked over towards the younger giant and reached his hand down towards him. "Here, let me help you there."
Startled at the loud booming voice, Asim jerked backwards, knocking down even more of the residence hall walls than he already had. He looked up at the boy in front of him, realizing that he seemed to be every bit as big as he was, though a few years older. He hesitated for a moment, then finally grabbed a hold of the extended hand, standing up to his full height.
"Looks like we're both in the same boat here," the older boy said as he grinned. "Name's Collin, by the way."
"I-I'm Asim." Steadying his footing, he looked at Collin, realizing that, even though the giant next to him was older, they both appeared nearly the same height, which looked especially odd considering they had both retained their earlier proportions. At first, he was embarrassed that they were each naked, but when he noticed the size of Collin's package, he whistled in admiration, feeling a twinge in his own cock. That's when he looked down and saw that he, too, had benefited from an enhanced endowment, nearly as big - if not maybe a little bigger - than Collin's was right now.
Collin noticed this as well and chuckled. "Well, Asim, I would say that we're both pretty excited about the situation we're finding ourselves in, if you know what I mean. But first thing's first: do you know why this has happened to us?"
"No, I have no idea." Asim shook his head. "I mean, one minute, I'm blowing out the candles on my birthday cake--"
"Wait a minute," Collin interrupted. "Today's you're birthday too?"
Asim's eyes went wide. "Y-yes, it is! I wonder if that has something to do with it. Nah, that's silly, right? I mean, there's got to be hundreds of thousands, if not millions, who were born on a leap day."
The two boys had gotten so caught up in their introductions that they didn't notice they each were continuing to grow, now twice as big as they were when they burst out of the school building, growing at a steady pace of around a foot a second. As they looked down, though, they noticed that the world was still getting smaller around their feet. Looking back up at each other, they both had the same idea at the same time, though Collin was the first to voice it: