Yusuke, always a disturbed young man, is finally pushed over the edge when his father announces his engagement to a woman half his age. Twisted with lust and hatred, Yusuke manages to seduce his father's fiance and slowly turns her into his personal sex slave.

Yusuke, always a disturbed young man, is finally pushed over the edge when his father announces his engagement to a woman half his age. Twisted with lust and hatred, Yusuke manages to seduce his father's fiance and slowly turns her into his personal sex slave.

Earth is in grave danger, as evil aliens have set their designs on the planet. The only hope is Sayuka, the Escalayer, a "fully-functional" android who gains super-powers when she's aroused. But there's one problem: the lesbian sex Sayuka routinely engages in with her assistant Madoka is no longer serving its purpose. As the aliens send a dangerous new robot to Earth, the situation becomes critical.

As an average student, Kosaka always wondered what it would be like for girls to fight over him. But now his girlfriend Shizuka and his friend Kasumi are fighting over him...with swords. His school has a secret, a black gate that can only be opened by Shizuka and Kasumi, who each have a tattoo over one of their breasts.

When Shizuka opens the gate and makes a deal with the evil creatures on the other side, Kosaka and all the other girls at his school are thrown into a deadly fight against evil.