In the city of Rakkachou, also named "Yakuza Town" by some, high school student Megumi returns home to find her beloved dog brutally murdered by a depraved person—all to coerce her mother into selling their house to land sharks. The incident draws the attention of Hiromasa "Nine" Tsukumo, an odd individual who is followed by a powerful disfigured creature that no one except Megumi seems to notice. As Nine tries to establish his own yakuza group with the intention of protecting the innocent residents of Yakuza Town, he gradually leads Megumi closer to the ultimate truth of their world.

[Written by MAL Rewrite]