Jon shifted in his bed a bit, still unaware that anything was unusual.
Until he woke up.
The first thing he noticed was that he felt a tingly chill all over his body, like he had come down with the flu. But it was as he went to the bathroom that he had to rub his eyes.
His skin had darkened somewhat overnight, but his hair had darkened completely to a jet black. It also was starting to become coarser than Jon had ever remembered his hair being before. He was feeling a few random aches and pains, and...was he starting to sprout breasts?
He rubbed his eyes a bit, but this was all too real. What was going on?
After throwing on some clothes, he clambered downstairs to the sight of his mom, who turned in confusion.
"Is that you, Jon?" It took her a minute for things to click. "...Oh dear, it's SSTRS, isn't it?"
"What?"
"That disease where a boy turns into someone's twin sister. That said, not many people I know look like that," she explained.
"Wait..." Jon was still processing everything, all while feeling rather ill. "Twin...sister?"
Mom nodded. "I wonder who it will be. Sometimes people are drawn to their new twins, so you might know sooner than later... Let me call school and tell them you won't be coming, okay?"
Jon could only nod weakly before returning to the comfort of bed.
———
Janelle woke up excited and a bit nervous. Her life was about to change, in almost every respect for the better. Sure, she'd have to learn to share in a way she didn't have to with her older brother Ryan, but she was excited to have someone to share her life with.
Jon's house happened to be between hers and school, so on her way in, she drove past. Everything seemed normal, and Janelle wondered for a moment if she should stop.
Ultimately, she decided to...