In the infamous city of Rakkachou, known as 'Yakuza Town', teenager Megumi arrives home to a heart-wrenching sight—her cherished pet brutally slain in a twisted scheme to force her mother to sell their home to ruthless developers. This tragedy unveils a mysterious figure named Hiromasa 'Nine' Tsukumo, accompanied by a grotesque being visible only to Megumi. As Nine embarks on forming his own yakuza clan to safeguard the town's innocent denizens, he guides Megumi on a path toward uncovering the profound secrets shrouding their reality.