Marine aiming for idle started a byte with a maid cafe in Akihabara. At that lolita face she quickly becomes number one, but senior Meg who was deprived of popularity is not amusing. Meg collaborates with other maids, repeating persistent bullying of Marinha. Bullying is getting extreme, such as being uploaded to the net as a snatched image in the changing room, but marine gradually gets pleasant.

They took her identity. They took her freedom. Now, in a man-made labyrinth of concrete and steel, where terrified young women are stripped of their pasts and humanity, she has been reduced to the level of prey. Prey for the ancient evil that lurks inside the walls of this penitentiary; an invisible hunter that stalks the halls of the damned, feeding on the tortured souls within. Against this unnamable horror, the inmate known as Sigma must face a fate beyond her worst nightmares; something far more terrifying than anything the brutal guards and corrupt wardens could imagine. Because unknown to them, Sigma has come to this place on a mission of her own. There's something far worse than death inside this prison, and it's waiting for FEMALE PRISONER SIGMA.

In Tokyo, prostitution in the name of "Enjo Kosai" is in fashion among some high school girls. A mysterious man Kuni lament such girls but cannot deny a strong desire for them. He punish the girls by having sex with them without paying them. He calls this operation "Stop the Bitch Campaign" for public justice. Working in a sex trade shop where abnormal people are satisfied with their lust. Aoi tries to find out the man who raped her desperately in the past. One day, Aoi meets Kuni.

Fuyuki witnesses Chihiro, an office lady, being groped on the train. In the confusion, he also touches Chihiro's body, but warns the culprit, Tamura, but he claims that he is innocent. Then Naho, who claims to be a lawyer, appears and shows him a photo on her cell phone that shows evidence...

Botan teaches cello at the music school run by her husband, Yamano. Despite their age difference, they are a loving couple. One day, Asami, Botan's admired senior, begins frequenting the music school as a piano tuner. However, Botan is bewildered by his somewhat gloomy appearance. Asami relentlessly pursues Botan, eventually attacking her like a snake stalking its prey. And there, watching the scene unfold with an ecstatic expression, is Yamano…