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Two undercover agents Riko Ikazuchi and her junior partner Noma, who are infiltrating an apartment that is also the hideout of a criminal organization. They pretend to be newlyweds. However, when the culprits do not hear noise from them at night, they get suspicious. In order to convince the culprits that they are a married in couple in love, they start to touch and make some noise... Despite feelings of humiliation and pleasure throughout the undercover investigations, Riko endures it and devotes herself to her justice.
Father Yuri brings up the International Breast Research Society and their claims to be able to rid women of their ailments. Katja decides to investigate the rumors surrounding them further and learns that the society is not all what it seems.
Lately, shy Manami has been flirting outrageously and sparking vicious catfights! Afterwards, she remembers nothing. Can it be that another personality seethes beneath her own — a wild woman who'll do anything to find trouble?