巨乳魔王の敗北～勇者にヤられた魔族の女王と姫君～（Kyonyuu Maou no Haiboku ~Yuusha ni Yarareta Mazoku no Joou to Himegimi~）

Humanity was once ruled by a woman of immense power—the Demon Lord—and lived as little more than livestock. But then, a hero appeared, defeating countless monsters and finally confronting the Demon Lord herself.

“You’ve come at last… I’ve been waiting for this moment, hero!”

“Brave words, but… do you really not care what happens to this one’s life? ♪” However, hero had taken the Demon Lord’s daughter—the princess—as a hostage, leaving her no choice but to obey his every command.

And so, the Demon Lord and her daughter, the princess, found themselves subjected to the hero’s depraved and humiliating quests, their bodies and minds trampled underfoot by his depraved whims.

[Translated from getchu]