The need to cum had gradually overtaken Raijin since his accident at the store. Now it had built to the point that it was impossible for him to focus on anything else. He needed to relieve this urge before he could take stock of all these changes.
His frantic strokes finally began to harden his now massive member. He briefly marvelled at how much bigger it was even now than it had been fully erect before. As it grew more rigid, he began taking longer, more deliberate passes along its length. It soon became a two-hand job as the girth of his cock was a bit more than a handful. With a couple of quick pulses, his penis straightened above the horizon and swung itself upward toward his sweaty abs.
Raijin, believing that he was now fully hard, began to increase his pace again, panting gently as he worked toward release. However, as he looked down at his huge erection, its head now well past his navel, it seemed to be stretching even bigger before his eyes. "Woah! Sh-shit," Raijin gasped as its 10 inches reached further up his abs. Its first erection was still pushing the newly-grown tissue to its new limits. Moments later, his hands were sliding along 11 inches of thick meat, and he could still feel the pressure of its growth working inside. He paused his hands temporarily so he could watch as it throbbed bigger and bigger with his heartbeat. Several pulses later, it seemed to have finally achieved its full size of 11.5 huge inches. Its wide, shining head reached 3/4 of the way up to Raijin's tight, heaving pecs.
He began stroking again with his left hand and reached out with his right to caress his massive glans. After only a couple of rubs of his taut cock head, he finally began to feel a great throb between his huge balls and the base of his dick heralding the beginning of his long-awaited orgasm. He resumed jacking himself rapidly to speed along his climax. He could feel it build as he came closer and closer. He picked up his pace a bit and began sweating even more. At last he felt it boil up through his huge shaft. He watched as it hit him. His slit yawned wide and a huge eruption of clear precum spilled out over his dick. What he hoped would be an orgasm was merely the beginning of a steady stream of pre that now lubricated his giant tool.
"Ugh! Fuck," Raijin moaned. Now it was as if a fire had been lit in his groin. The unnaturally strong need for release he had felt before now was nothing compared to this. This was a frankly inhuman level of desire and ardor. He checked out the sight in his full-length mirror. Having outgrown it at this distance, all he could see was his huge, muscular body jerking a gigantic erection that was spilling pre everywhere. His skin was flushed and he was sweating buckets as he worked himself into a frenzy. This time, the feeling building behind his dick was white hot. It pulsed through his entire body in spurts almost as though he were being punched by his own throbbing balls. His hands pumped and twisted around his cock lightning fast thanks to the heavy coating of lube. With every breath, stroke, and heartbeat, his pleasure swelled. He reached a trembling hand down to cup his nuts. They felt huge, almost a handful each. He gave them a gentle tug and squeeze. At last the dam burst! Stars filled his vision as his orgasm roared through him.
Raijin clenched his teeth and grunted as he began to release. He barely felt the first shot fire though his huge dick, but it was still as large as a normal man's entire ejaculate. His balls clamped down for the next shot, and it was pure pleasure as it blasted out of his cannon. It was twice again as large as the first as it splattered against the mirror. Raijin roared and bucked his hips in time with each huge load. It took several shots before they started to diminish in size, but each one electrified him with pleasure. Finally, the last few bursts dribbled out to nothing leaving Raijin awash with relief and his balls satisfyingly empty. Cum slid down the mirror and the wall and pooled on the floor of the kitchen. He would have a lot of cleaning to do, but it would have to wait. Now that his head was clearer, he became more aware of the other changes his body was going through...