Princess Body AS ~ Harami Hime-Tachi no Koukyuu Monogatari

Beautiful princess Arin was violated by a gang of mercenaries. While her lover
Herriam spent months away killing others, she was brutalized into depravity at
home. She got pregnant and had an illegitimate daughter, Aqua. When he found
out, Herriam vengefully impregnated Aqua.

By then all decency was gone from the royal family.

Harrium built a harem of fornicating pregnant women. It became a hedonist's
paradise known as Herriam's Kingdom. Arin and Aqua competed for the queen's
throne of this debauched mini empire.

Aqua used her youth to win. But Arin called an even more beloved princess from the castle...

Her name was Ranza...

[From DLsite English]