魔子宮聖女ビアンカ∽ノエイン～終焉なき破瓜と悦楽の煉獄～（Mashikyuu Seijou Bianca ∞ Noein ~Shuuen Naki Haka to Etsuraku no Rengoku~）

“The presence of two Saints shall bring calamity.”

There were two young girls chosen by “God” to serve as mothers of divine conception.
However, due to an ancient prophecy, only one of them—Bianca—was allowed to remain within the royal family, crowned both “Princess” and “Saint.”
Her younger twin, Noein, was cast out into the wild.

Years passed. Bianca eventually ascended to the throne and was set to perform the sacred ritual to conceive the child of God— But on the very day of the ceremony, she was abducted by a demon and vanished without a trace.

The absence of a queen and saint could not be tolerated.
In haste, the abandoned Noein was summoned back to the kingdom and enshrined as the new Saint.
At the same time, news arrived confirming Bianca’s survival.

Yet the kingdom, unwilling to accept a saint who had fallen into the hands of monsters, rejected Bianca outright.

To fill the void left by her sister, Noein entered the royal court, gained political power, and even secured the allegiance of the “angels.”
With years of bitterness festering in her heart, she now began her revenge on her sister Bianca.

Meanwhile, the once-revered Saint Bianca found herself surrounded by creatures of various monstrous races.
Encircled by grotesque beings, the fate awaiting her only grew more horrific by the day.

Thus, the twin sisters—identical in face, form, and divine power—
Whether they wished it or not,
Were dragged into a war between angels and demons…