Summary
While Takashi Komiya lacks any distinctive qualities, his Russian step-mother and step-sisters are remarkably attractive. The Komiya household is currently populated by boisterous and provocative women: Yuriya, his lustful step-mother with a history in gravure modeling, Anna, his industrious yet suppressed elder sister, and Rina, his irritable yet covertly masochistic younger sister. Upon uncovering their clandestine existence characterized by illicit cosplay and late-night sexual encounters with unfamiliar individuals, Takashi resorts to blackmail. He is now resolute in his goal to mend the familial relationships by appeasing all the promiscuous ladies residing in his household, even when his father returns home.