So the storyline sort of started with this one: http://www.furaffinity.net/view/8716500/

They escaped from the lab they were made in, but were seriously injured. The guy barely dragged them both out of danger and stayed inside a damaged building during cold winter. He barely hung on, but she wasn't so lucky.
And as soon as he lost track of her breath, he lost it and started screaming her name.

There are a couple more coming with this series, I think ;D