The white tiger and the black beast - Nakajima Atsushi and Akutagawa Ryunosuke fought side by side and won the decisive battle against Francis F. The great supernatural war with the "Guild" that attacked from the big country came to an end. The truce agreement between the "Armed Detective Agency" and the "Port Mafia" in this battle is still continuing, and Yokohama, which survived the crisis of destruction caused by them, is also playing out a story called daily life on the roadside today. However, rumors of the influx of overseas criminal organizations and the shadow of the remnants of the "Guild" are still looming here... On the other hand, Dazai Osamu began to worry about the awakening of the "demon" and the new disaster. The leader of the thief group "Death House Rat", Fyodor D, is ready to move in the dark channel. His terrifying strategy has finally revealed its fangs!