It's been six months since Arakuni Ibuki became a bodyguard, and Sosoji High School is bustling with activity for its annual cultural festival. However, Class 3-4 is faced with an attack by Ogami and Nozu, former members of the Jingu Gang. The class wasn't sure how to pull off a defense mission in the presence of ordinary students, but at Ibuki's suggestion, the class will face off against the yakuza under the guise of a play in which they "protect Honeko Akabane, whose life is in danger." Now in a position where they can fight without any worries, Class 3-4 is in top form and can perform their attack plan!