Yoichiro Yamato, the protagonist, was daydreaming during class: “What if terrorists attacked the school…?” It was just a bit of reality-evading during midterm exams… but then, terrorists suddenly stormed the classroom for real! They sprayed a mysterious gas, transforming his classmates into zombies! Escaping the classroom alongside his childhood friend and classmate, Asuka Shinomiya, they flee into a storage room. With zombies closing in and their lives on the line, both of them start to feel their bodies burning hot… Driven into a state of heat and thinking, “I can’t die a virgin!”, Yoichiro and Asuka end up having sex right then and there! Suddenly, enveloped in a mysterious light, their hidden abilities begin to awaken!