Jake stretched his muscular arms as he sat up in bed, then threw off the covers. He was dressed in only a pair of blue boxers, which is what he wore at night, and his muscular, but lean, 10 year old body was largely uncovered. His blond hair was messy, but his green eyes were already quite awake. He jumped to his feet and did some morning flexes; his strong six-pack, his toned, bulging biceps, and strong, large pecs. Every muscle was large and perfectly toned on his 5 foot frame, and yet he looked lean, not bulky; rather like a superhero. He even took a moment to grasp his firm bubble butt. His boxers were also tight enough to show his rather sizable bulge. He looked every bit the god he was.
"Hey Jake," said his best friend Alex through the door.
Jake quickly crossed the room and opened the door to see a boy his age with brown hair and blue eyes and a similarly muscular build to himself, though Jake was obviously slightly more built. He wore boxers too, showing his body off. "Good morning Alex," Jake said, his voice charming and boyish.
"Ready for another day of fun?"
"Of course," Jake said.
"That's good!" Alex said cheerily.
Jake grinned as he instantly regressed Alex in age, making him a muscular eight year old instead of a muscular ten year old. "Heh, I love being transformed," Alex said, noticing his smaller body, and looking up about six inches to his friend.
"It makes you cuter, that's for sure," Jake said, kissing him briefly.
In another instant Jake had aged six years, now standing a foot and a half taller than his 4'6'' tall friend, a 6'' tall teenager. His muscles grew proportionally, but he hadn't grown his boxers and now stood naked. "Starting off fresh with some easy changes," Jake said, his voice now deeper and more manly sounding.
In another instant the positions were reversed, and Jake was the eight year old and Alex was the teenager. It stayed this way as Jake got in the shower, aging back to ten while he washed himself, and Alex chatting to him and leaning against the wall, also reverting back to ten. Then Jake stepped out of the shower and toweled off while Alex showered. "So," Jake said, wrapping a towel around his waist and aging to twelve, "What should we do today?"
"I kind of feel like going to school," replied Alex, while a pair of wings extended from Jake's shoulders.
"Me too. But I'm not sure which," he said. "Elementary?" he asked, regressing to eight, "Middle," at which point he aged to twelve again, "or High," he finished, aging to sixteen. "Hell we could even do college," he added, aging to eighteen.
"Well," Alex began, pausing to get out of the shower and towel off.
"We could even do pre-school," Jake added, regressing to about four, then returning to ten.
The two of them walked out into the hall with towels around their waists, and clearly proud of their muscular physiques, despite being the only two round. "So Alex, what's it gonna be?"
"I think we should go to..."