For generations, women have been the breadwinners of families. Like mantises, they only use males for fertilization, then discard them. Thus, the Daitoro family, a line of crazy females whose sadistic lesbian temperament has been amplified to the limit. The head of the family, Hana, who owns a huge fortune and lives a luxurious life, and her beloved daughter, Misato. The next prey to the twisted sexual desire that has long been passed down in the bloodline is Minori's old friend, Miyuki from the orphanage.