ヤクザが支配する街、暗黒都市オオサカ。
ひっそりと浮かぶ人工島サキシマには、ある噂があった。
ヤクザを狩る狼が出る──と。
狼は妖刀を使い、ヤクザの尊厳を喰い殺す。
それ即ち──ヤクザを幼女に変貌させる恐るべき異能！！！！
ヤクザを狩る高校生×元ヤクザの幼女！
強烈すぎる偽兄妹が、暗黒都市オオサカにはびこるヤクザ相手に大立ち回りの、凸凹任侠バトルアクション！！！
The grim city of Oosaka is controlled by the Yakuza. On the secluded artificial island of Sakishima, there exists a rumour: There is a “wolf” out hunting the Yakuza. This wolf would use a demon sword to slay the Yakuza’s dignity. That is, this sword has the ability to turn them into little girls!!!!A tale of the high-school student who hunts Yakuza and the former-Yakuza girl! These pretend-siblings with a bond too strong will face the Yakuza infesting Oosaka. This is a battle-filled and action-packed story of chivalry featuring big twists and turns!!!
