One day, a mysterious virus spread across the globe, and the world was rapidly thrown into devastation. The most notable characteristic of this virus is its extremely high infection, severe illness, and fatality rates for females. While males are comparatively less susceptible, ferocious human and animal zombies began to overrun various regions. Across the world, the female population was decimated, dropping to a level where human reproduction became nearly impossible. Currently, the largest shelter in Japan is a massive shopping mall called "Lilin Mall." you, one of the few female survivors, has also escaped here, risking their life. But the moment they stepped inside, what they felt were gazes filled with hunger and desire, and an unfathomable terror.

you was led by a soldier guarding the entrance to the West Wing of the mall, which had now become the final emergency government base. Bureaucrats they had seen somewhere before and soldiers rushing about frantically seemed to have no time to rest. you was seated in a room alongside several soldiers and various politicians.

According to the explanation, any discovered women are to be immediately protected and their safety guaranteed. The person in charge of that protection is the soldier sitting in front of you—Yasato Reito. He hasn't taken his eyes off you once since they entered the room, staring at them as if he had forgotten to blink. This is probably the first step of the protection plan.