Futanari Supergirls: Origins - Futanari Supergirls, #1

Nikki Jones and Shaylene Tate are ordinary college students, best friends all their lives, sharing and doing everything together. One day Shay wakes up with her body having changed during the night. This mysterious change has left her confused, scared and hopelessly horny. Will Nikki be able to help her change back? Will Nikki be able to overcome her newfound attraction to her best friend? What other changes might this anatomical change have brought? Whatever happens, the girls will face it together. This 8, 300-word story is part one in a series.
Each will be available separately, and as five-part anthologies once each sets of five is complete. In general the series will feature futa-on-futa, futa-on-girl, futa-on-man, and gender swap elements. This one features futa-on-girl. This story depicts adult characters consensually engaging in explicit sexual situations. None of them are related, either by marriage or blood relation.