A/N: This story idea has been dancing around in my head for a few days, but I haven't had the chance to get it down. When it first came to me, I thought it would only take me three parts to write it, but I don't think that's going to happen. We'll see though. There will be lemon in later chapters, good lemon. Z/C and S/C lemon, in fact. So stay tuned. This story contains male/male action and language. Don't like, don't read.
This chappie is just Z/S though... because I like, can't get anywhere without a little bit of sexing. XD I kind of like how this chapter weaves in and out of story and pr0n, tell me what you think. Also, tell me if I went overboard with Zack's yelling. I couldn't decide, so I just left it as I wrote it.

. : Crash Course : .

Chapter One – Of Mako-Crazed Sex Drives

“Mm... oh, yeah... Sephiroth... uh!”

Zack raised and lowered himself again and again, connecting so hard with the general's thrusts upward that he felt like his brains were going to get fucked out of his skull. Neither of them were doing a very good job of suppressing their moans and cries, but it wasn't like it mattered. Sweat trickled down Zack's taut chest and back and he panted, tilting his head back slightly as another noise escaped his mouth.

Sephiroth looked up at Zack with lust glazed eyes and tried to maintain his composure. Fucking this seemingly empty-headed and overly-friendly teen who was only known for his potential among the executives of Shinra shouldn't have been so undoing. Of course the general didn't think that way about Zack; he knew he was smarter than most of the boys they had recruited this year and he liked the fact that he didn't know a stranger.

Sephiroth's mind drifted in the mess of pleasure he was feeling and the hot, sweaty body above him that he was watching. He pushed his hands up the smooth thighs that straddled his own hips, palms feeling how hard the strong muscles of the young SOLDIER were working under the flawless tanned flesh in somewhat amazement.

The general was disappointed to know that it wasn't just old fashioned physical training that made those muscles so strong. It seemed Shinra's scientists were finding ever more new ways to induce muscle gain intravenously and without much change in body shape. Their only explanation being that they needed the soldiers to be able to lift and wield buster swords faster. Instant gratification was the new trend that could never be sated.

“Ahh-hah! ...Seph, please... nn! Oh, fuck... I'm so close!”

Zack's sudden plea drug Sephiroth from any more thought. The desperate tone in the dark-haired teen's voice tugged at him hard. He liked being needed for something other than waging war and commanding the world's greatest army, something without political loss or gain, something without mindless bloodshed. He liked being needed for something as simple as satisfying this teen's ravenous sexual appetite one or two times a week. Mako-crazed sex drives. Another accomplishment of Shinra's scientists.

Snaking his hands around the curve of Zack's ass, Sephiroth gripped hard and lifted him, bringing Zack down as forcefully as he could without causing injury. The general was surprised at how good the motion felt to him, and the fact he had been so concerned about pleasing Zack and not himself caught him off guard.

“Oh, yes! Sephiroth, yes!” Zack cried frantically, throwing his head back.

Sephiroth repeated the motion again with Zack's very vocal approval, and then once more before Zack spilled himself all over the general's chest. He came himself a few moments later, unable to hold his own any longer against clenched muscles and stimulating cries. There was a pause as the two took a moment to stop shaking from the intensity of the orgasms they had given each other before succumbing to the satisfying accomplishment of completion.

Zack slowly sat up on weak knees, easing the general's dwindling erection out of him with a content little sign. Arms stronger than his own enveloped him, bringing him down to lay on his side, facing Sephiroth. He looked at the general with trust and fondness, and in this unscrutinized situation, the silver-haired man returned the expression genuinely as he threaded fingers through black spiky hair.

Green and violet eyes slipped shut, and their breathing slowed to the speed of sleep.