While investigating a potential threat alone, the female trooper Brain Jacker is ambushed and subjected to a series of brutal, aphrodisiac-fueled assaults by a chimera and the sadistic Pegasus. After being pushed to her physical and mental limits, she is rescued by her allies, Ryuusuke and Mikoto. Traumatized but determined, Brain Jacker vows to reclaim her dignity and destroy the monsters who humiliated her.