Once upon a time, three teenage girls were possessed by demons from another world.

Now the Sirens have Equestrian magic, freedom from their old host bodies, and the entire school under their control.

It's time for them to start breeding an army…

(Basically a clopfic)

Contains:
Rape, Mind control, Oviposition, Impregnation, Inflation, Interspecies, Bad ending (no death, though).