About a year ago, Mikage Azusa, a ninja belonging to the ninja group "Oboro", infiltrated a base of the huge criminal organization "Meigas". In that base, she encontered the "Orc", a biological weapon created by the scientists of Meigas.

Getting caught in Meigas' trap, Azusa becomes a prisoner and ends up as a breeding partner for the orc breeding experiments.

After being raped for a few months by the seemingly inexhaustible reproductive instincts of the orc, Azusa is finally impregnated by the orc and ends up giving birth to its child.

After a deadly battle, Azusa took down both the Orc and her child, however a new life was already dwelling in her womb.

A few months later, the number of orcs started to increase dramatically in the Kanto area.

Against the incredible regenerative abilities of the orcs that cannot be taken down with conventional weapons, the Japanese government gives up on their extermination and start the "East Japan Great Blockade Operation".

Inside the sealed Kanto area, the Orcs kill the men and rape the women...

In the center of the sealed area, there was 2nd "Lord" that Azusa gave birth.