Kotone Kiba is the wife of Mitsuru Kiba, boss of the Kiba gang in the Saikyo Alliance. She hides a girl named Sakura Nishizawa, who is chased by Azami Kato. Azami is the wife of Shuhei Kato, boss of the Kato gang in the Saikyo Alliance. Years ago, Azami's lover was murdered by Mitsuru Kiba. To get revenge, she married Kato. Through the girl Sakura Nishizawa, Kotone and Azami unexpectedly meet and become involved in a large conspiracy.