Adam stared at the watery fluid in his hand. His quickly softening penis was still pulsing but no more semen was coming out. A few years ago masturbation would be something he would do for pleasure but now all it did was remind him of what he lost.

The reason why his semen looked so watery was simple, there was barely any sperms in it.

He sighed in frustration and cleaned his hand under the tap. This wasn't the issue that affected only him, every guy had the same problem. It popped up suddenly and spread unnoticed worldwide. It only affected males and the symptoms were so slow to show up that by the time doctors became aware of it, the damage was done.

All males around the world had been rendered infertile. The virus had attacked their reproductive organs, specifically their testicles and completely destroyed their ability to create new sperm cells. Without sperms, men could no longer have children.

As one would expect, most men didn't take it well and Adam was not an exception.

The feelings of humiliation were bubbling up inside him but he did his best to keep them down. He barely became a man and his manhood was imediately taken from him. Luckily he had a reason to keep going, his family and more specifically his younger sister, Sarah.

When the initial news news hit him and he got heavily depressed, his little sister was there to cheer him up even though she didn't know what exactly happened. Just seeing her big brother sad was enough for her to be there for him. During those first few months she kept pulling him away from his negative thoughts by constantly asking him to play games together and keeping him company in his room. They had lots fun together and enjoyed each other's company which did wonders for Adam's mental health. It was safe to say that right now they were much closer then most siblings.

While it didn't really matter in their sibling relationship and everyday life, Sarah wasn't exactly a normal girl. She certainly looked and acted like one, but she was born with both male and female sets of genitals. She was officially a futanari.

Since she also was partially a man and had testicles Adam assumed that the virus has also affected her ability to produce sperm cells. She didn't learn about sex yet and didn't even have her first erection, but Adam felt like he needed to be there for her when she inevitably would have to deal with the same issue that was plaguing him.

With another sigh he turned the bathroom light off and headed towards his bedroom

He was about to find out very soon that his assumptions about Sarah were very wrong.

***

Adam's room was dimly lit. The curtains were closed and his computer was off. It was pretty late and he was getting ready to go to bed when he heard a creak of his door and a familiar voice calling for him.

"Brother..."

Through the slightly open door he saw Sarah peeking in. She was wearing her usual night shirt that reached down to her knees. The tone of her voice told Adam that she was in need of some help.

"What happened?" He asked her.

Even in the weak light he could notice that her face was flushed red and her eyes were looking away in embarrassment. She seemed to be trying to hide behind the door.

"Something happened..."

"Did you have a nightmare?"

This wasn't the first time she was coming to his room this late asking for help.

She shook her head.

"So... something else..."

She was silent for a second and then finally spoke up.

"My peepee... it's hard and it feels weird."