From Dog Street, you can see the Mikado Building, the headquarters of the multinational Mikado Group corporation. You can expect to find many bouncers in the bars in this part of town. Sion, Kou, and Vold are bouncers who defend their bar, Fate, from any hooligan that tries to invade their territory.

Dominique, a young girl Sion found lying in the middle of town, eventually becomes a mascot for the bar Fate, though nobody really knows where she comes from. For a while, everything is peaceful and boring. Suddenly, however, Dominique is kidnapped by Mikado's Special Forces. What is Mikado up to? What is Dominique's secret? Can Sion and the other bouncers save Dominique? The bouncers' longest night is just about to begin!