In order to discover the cause of the phenomenon of human combustion, Shinra and his comrades of the 8th Special Brigade of the Fire Force stormed the brigade headquarters! Violent fighting is taking place and Shinra finds himself faced with the impressive firepower of Princess Hibana, charismatic captain of the 5th Brigade!! Will Shinra be able to defeat this woman after discovering her connection with Iris?! So what is the surprising truth they will discover about the phenomenon of human combustion? This time again, it will heat up!!