Not dark exactly, but it does contain some darker elements.

Kate and John Miller were two conventionally attractive twenty-somethings that got married just a few months prior. They had a good life: good jobs, a nice house, and all of the normal luxuries that one would expect of two upper-middle class people.

However, the one thing they didn't have a lot of was time. Both had demanding jobs and both started to realize that their hectic schedules were taking a toll on their relationship. While there was only so much they could do, one thing they could do was pencil in some time each week for a date night.

Often for these night it wasn't just about spending time together, but doing new things and having new experiences. While they often didn't eat at pricier restaurants (they could afford it, but who has the time to sit down and slowly enjoy a meal) they made an exception for tonight.

John had decided that his best three-piece charcoal suit was the right choice and Kate decided in a sleek red dress that was both classy and very flattering to her busty figure. She was a bit pale, though, and opted for sheer tan stockings to give her legs some color and a pair of striking red heels.

As he put on his tie, checking his hair at the same time to see if his short brown hair was in order, she was soon giving her black hair a quick brush and last-minute work to give it a bit of volume. She wanted to look great tonight.

They soon were ready and got into their car to drive to the restaurant. A couple of blocks away, they had to stop. There was a car in the middle of the road, turned as if it had to swerve out of its lane, and despite the sun setting they could plainly see the damage to the front of it. In front of the car was an ambulance and what looked like someone from a tow company.

Great, John thought. This was the quickest and easiest road to get to where they needed to be. All the rest would be congested or be too indirect.

Kate then saw two people walk towards their car, one a paramedic and the other from that tow company. John rolled down his window as they approached.

"Evening." The paramedic said. He was in his late forties, big, fit with very short black hair and pale face. "How are you two doing this night?"

"Uh, what happened?" John cut to the chase.

"So, a car went left of center on this guy, this guy swerved, and..."

As the paramedic was talking the tow truck driver, a shorter, heavier, strongly built man with a gray black beard and a bald head took out what looked to be a can of pepper spray and emptied it into the car at both John and Kate's faces. It wasn't pepper spray, they soon learned as they immediately went from alert to unconscious.

John woke up first, realizing he was sitting in the driver's seat of a vehicle, but not his own. He looked right in front of him and realized it looked more like the inside of a working truck. Quickly remembering what had happened, he realized it was probably the tow truck at the car crash they had stopped for earlier.

Wait, did that mean that those two men were still around? Why did they move them here? He looked to see if they were around and where Kate was.

He looked outside and saw no one and then looked at Kate and stared in horror. She was just waking up and he went to shake her the rest of the way awake, putting a strong, very large working hand on her now heavily-built shoulder.

When she fully woke up, she looked at him and she did the only thing she could think to do. She screamed, and soon both of them were in borderline hysterics over their situation. They were too scared to get out of the tow truck, but as best as they could they tried to figure how their new situation.

John could see plainly that Kate now had her feminine head stitched onto the body of that tow truck driver from earlier and he, judging just from size and uniform he now had his head attached to the body of the paramedic from earlier as well! They couldn't do much initially, they were in too much shock at their situation, Kate in particular. After all, there is little one can do to prepare you from going from an attractive twenty-seven year old woman to a forty-ish strongly built man! She looked down her shirt, seeing her hairy chest and could not stop feeling her large and hairy arms up. She didn't even want to think what was below that, what was now between her legs.

John, while he didn't have the same gender-switching crisis, was still in shock as well. What was he supposed to do now? What were they supposed to do?

It was at least a half an hour before both of them realized that the paramedic and tow truck driver were gone, as was the ambulance and the "crashed" car. Both of them now realized that had likely just been a ruse to get them to stop in the first place and they were looking for someone to do this too. So, where were they? What were they doing? Did they have their bodies, or did something else happen?

It was dark out and both realized they just wanted to get home. At least there they could feel safe. They were both glad that home was no more than a few minutes away.

They pulled up with the tow truck, John glad he had learned how to drive stuff like this in his college days. They pulled into their driveway and got out, going to their garage door to use the code to let them in. As their garage was pretty secure, they had a spare key hidden in the garage in case they needed it.

They put in the code and the garage door opened and in their garage was John's car, the same one they used to drive to the restaurant together. There it was, parked like they had never left. Both of them looked at each other and their blood collectively went cold.

John had to know. He found the spare key and went to use it on the lock, only to see Kate open the already-unlocked door.

It was then that they both heard sounds from upstairs, movement but more than that, it was moaning. Hard moaning and male voices. Instinct should have told them not to go up there, but confusion, anger, morbid curiosity was stronger.

They were not subtle and there was no way that whoever was in the house didn't hear them. It didn't matter, they would be on those people in a moment, they just had to turn the corner to get into their bedroom...

...And both of them were greeted by a sight neither had somehow expected. Laying on the bed was obviously John's body, naked from at least the waist down, but they couldn't see the face of the person. However, on top of John they had a full view of the person.

Looking right at them, a sly smile on his face as he moaned, was the head and face of the tow truck driver, and below his head and neck was Kate's body, naked except for her tan stockings and red heels. Both realized that they were in the middle of sex, the tow truck driver riding John's former dick hard, feeling his bouncing tits up and the other person used John's strong hands and hips to thrust hard into Kate's former body.

John had to know and moved around them as the tow truck driver watched him. It was the paramedic, John thought with a bit of mental detachment, his mind almost clinical with that information.

Kate, however, was not so emotionally drained and screamed at them.

"What the fuck are you two doing?!" She yelled. "Get the fuck off of him! Get his dick out of my body!"

The man just smiled and groaned hard, and both Kate and John then heard a small but hard moan coming from the paramedic's mouth. Both knew what that meant.

The paramedic came, and John and Kate looked on as they watched their bodies orgasm, both unable to muster up the courage to do anything. When they had finished was when the paramedic and the tow truck driver stopped, and both them stood up and smiled at them.

"Unless you want a fuck yourself," the tow truck driver said. "Get out. But, if you do want a fuck, I think I can handle both of you at once!"