Koishi Komori appears to be an ordinary office lady, but in reality, she is a member of the combat ninja unit known as Scorpion. Her workplace serves as Scorpion's headquarters, hiding astonishing secrets within her daily routine. One day, Koishi is assigned an extremely dangerous mission: infiltrate Golgoda's hideout. Penetrating the central base, she finds herself surrounded by countless zombies. As she fights them off, more keep coming, gradually overwhelming her. Her entire body is licked raw, soaked in zombie semen and urine, until she finally collapses from exhaustion.