Futanari Supergirls: Galaxy Girl and Stormwing

It's been a week since Shaylene Tate's body changed, and she and her best friend Nikki Jones are no closer to figuring why she grew male anatomy, or understanding the source of her mysterious new powers. They've essentially gone into hiding, avoiding other people until they can learn more about Shay's new body and abilities, so she doesn't end up being experimented on in a government lab somewhere...