Gender Reversals

Shirou Muramasa. Rin Tohsaka. Sakura Makiri. Arthur Pendragon. These four Masters of Chaldea have secrets. They remember their past life and were born with opposite genders. Rin, Sakura and Arthur once part of one (former) man's harem. How will Chaldea respond to the secrets, and how will it affect in resolving Singularities and Lostbelts? Shirou better prepare for chaos!