For the school's final major event—the cultural festival—the members prepare for their long-awaited girls' collection, crafting unique and special costumes of their own. However, unexpected incidents arise from within these very costumes, threatening not only the collection but the entire festival itself. Despite thorough preparations and strict inspections by the student guidance teacher, troubles begin to unfold. What is the true cause behind this chaos? Amidst a series of escalating crises—including the "Scapegoat Report," "Blackmail Strip Training," "Cultural Festival Strip Show," "Lottery Blowjob and Handjob Session," and the "Full-Penetration Cutting-Board Show"—how will the members recover and carry on?