"Holy crap" Jake whispered in awe. It looked like he had a cucumber and two softballs inside his shorts. His underwear felt incredibly tight too, almost to the point of being painful, but it felt amazing on his massive member. Jake quickly moved in front of a table so that no one could see his bulge.
"Well, I can't make it any worse... or can I?" Jake wondered. The "up" arrow was not greyed out. Quickly Jake pressed it and held it down. The numbers ticked up more, past the point that Jake would call healthy and into the obscene range. The watch finally flashed a notice:
MAXIMUM SIZE REACHED: CANNOT BE MORE THAN 36 INCHES LONG
Jake's eyes bugged out - three feet of cock? Who would want that? He quickly cancelled that.
Otherwise, the options were fairly sparse. A couple miscellaneous options, including "ball size". Currently the box was checked to "match proportions" which Jake assumed meant that his balls would grow or shrink to match his penis. However if he wished, he could uncheck it and manually define a size.
Clicking cancel brought him back to the proportions screen, reminding him that he was over a foot long soft. He realized he'd have to get home with a monster cock in his shorts, which might get him some stares. While growing, his cock had simply curled over itself in the front of his underwear, which meant that combined with his balls, Jake looked like he had stuffed a watermelon inside his shorts. Looking around for a changing room, Jake spotted one and ducked inside, hoping no one had looked long enough to see anything.
Once inside, he quickly slipped off his shorts. His underwear was filled to the maximum, stretched trying to hold Jake's package. Quickly he grabbed the end of his cock and fed it through one of the leg holes of his underwear. It hung over halfway to his knee, and Jake actually worried that his shorts wouldn't cover it if he ran it down his leg. However, at least his package didn't stick out so far since his cock wasn't pushed forward by his balls anymore.
Looking again at the watch, Jake looked for an option that would at least temporarily bring him down to a more manageable size, but everything required buying the watch - though for a reasonable price, he noted. Sighing, Jake entered in his payment details and the watch chimed with a notice:
ALL FUNCTIONS UNLOCKED. THANK YOU FOR PURCHASING!
Quickly, Jake opened the settings menu and sighed with relief - the Adjust button was again available. His current size numbers were still displayed, though he realized he could now also adjust them individually:
"FLACCID LENGTH: 12.2123 INCHES"
"ERECT LENGTH: 14.4332 INCHES"
Tapping the down arrows until it reached his starting size, Jake hesitated. He didn't want to go all the way back to normal, but he definitely didn't want to be the crazy size he was now... or did he? Sighing, Jake hit the arrows until the screen displayed:
"FLACCID LENGTH: 7.2123 INCHES"
"ERECT LENGTH: 8.4332 INCHES"
Definitely bigger than what he had walked in with, but also manageable. Jake hit Adjust.
The effect was immediate - Jake felt his underwear grow less tight as his flaccid footlong shrunk back to 7 inches. Jake's balls also shrunk from their softball size to the smaller but still relatively large size of eggs. Still bigger than most people were hard, but definitely easier to manage. Although the fit was tight (though looser after Jake had stretched it out before), Jake managed to snugly fit his cock and balls into his underwear. They showed a nice, but not freakish bulge. After pulling on his shorts, he confirmed that although he did have a bulge, it was fairly average - at worse, people would just think he had an erection.
Even though he had wanted to shrink it, secretly Jake really wanted to go home and experiment with the watch, to see what it could do. He stepped out of the changing room and began to walk home...