Ryuko was raised by her father, a gambler named Senzo Yano in Kumamoto, Kyushu, after her mother died when she was little. When she turned 18 years old, her father was attacked and killed by a stranger in alley. Ryuko then dissolves her yakuza family, and, carrying the wallet left by the killer, she sets out on a journey to avenge her father's death. Five years later, she wanders the nation, known only as! Red Peony Oryu who has a red peony tattooed on her shoulder and has the defiance and courage of a man. She meets Katagiri - a loner gambler, Kumatora - boss of a family in Shikoku, and Otaka - female boss of the Doman Family in Osaka. With their help, she finally catches up with the man who murdered her father.

A local yakuza boss of a silk farming town shows kindness to the wandering gambler Oryu by letting her stay at his residence. When a rival yakuza gang, who wants to take over the town's businesses, murders him, Oryu is obliged to protect his children and business.

The third chapter of the ‘Red Peony Gambler’ saga depicts the happiness and sadness of Red Peony Oryu’s life as she seals her femininity with a red peony tattoo and lives in world of chivalry and honor of the yakuza. This story takes place in the middle of the Meiji era in Nagoya. Oryu is wandering the country, training herself to reinstate her family name. With a written recommendation from Kumatora, she appears at the door of the Nishinomaru family. At the same time, the family is preparing for the gambling competition at the Netsuda Shrine Festival, which they have been hosting for generations. Meanwhile, the crooked Kinbara family is plotting to take over the competition. And now Oryu is forced to get involved in the struggle…

The industrual revolution comes to Japan with the introduction of the railroad system. This led to clashes between boatmen, who livihoods are threatened, and the railroad construction workers. Oryu the Red Peony returns to her home in Kumamoto to accept her position as second generation leader of the Yano Family. But the ceremony is interrupted by fighting between local boatmen and railroad works. And it seems a rival family is pulling the strings behind the clashes.

Junko Fuji returns as Oryu the Red Peony, a wandering female yakuza on a soul-searching journey after the death of her father. After collecting her sickly follower from jail, she is taken in by a fishing village. Feeling indebed to their generosity, she stays to work for the village and promises to leave her yakuza ways behind. When a dispute breaks out for the gambling rights to a local festival, the villagers are harrassed by a gang of thugs. When the harrassment turns violent, Oryu must decide wither to keep her promise or protect the villagers.

Oryu searches for blind child she left behind and get involved in a Yakuza turf war that takes place in the Tokyo Theater.

The seventh chapter of the stunning Hibotan Bakuto series. Many years have passed since Oryu the Red Peony began her soul-searching journey after her father was killed. In her travels, she meets villagers whose crops and livelihoods are being destroyed by pollution from a local factory. They seem to work out an agreement, but Oryu must help the poor villagers when the greedy factory owner and corrupt politicians betray them…

The final chapter of the Hibotan Bakuto series. Oryu the Red Peony visits an old dying Boss of an ally family and promised her that she would help guide the new Boss. Meanwhile a turf war breaks out. When the family is betrayed from within and the rival family becomes violent, Oryu takes things into her own hands…