The protagonist of the story is a rookie hunter named Kiryuu Asuka. She uses the Fire Sword Shiranui as her weapon and hunts down lewd beasts with her cool partner Miyabi and a senior hunter Shizuna. As they pursue their prey, they gradually fall into the enemy's trap and find themselves in a desperate situation. What is happening inside the prestigious all-girls school? As Asuka infiltrates the school and behaves like a female student, will she be able to protect herself and her female classmates?