Suddenly, the trouble consultation box of the second newspaper department goes up in flames! Rino, Ikumi, and Fumi are blown away when they find the arsonist by making use of their specialties. After investigating the scene, Rino concludes that the culprit is a left-handed man. Fumi has come to the conclusion that the letters left behind in her charred remains are related to the mysterious secret organization "HHH Brigade", but...