A group of teenage girls known as "Sweet Angel" make a living by drugging lecherous older men and stealing their money and valuables. Their activities spark a dangerous conflict with the Kuroshishi-kai, quickly escalating the situation. The Kuroshishi-kai mobilizes all its forces to hunt down the Sweet Angel girls, but their efforts hit a dead end as leads remain scarce. Then, new intelligence emerges—revealing that Ren Usui, daughter of the powerful Usui conglomerate with deep influence in politics and finance, is a key leader within Sweet Angel. Falling into the yakuza group's trap, Ren is captured and subjected to intense, humiliating torture.