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Risa is a newlywed living a happy life with her husband, Takahiro. Suddenly, Takahiro's father, Masakichi, shows up in their loving newlywed home. He's a nuisance, taking advantage of Risa's kindness and doing as he pleases. To top it all off, he does indecent things to Risa when Takahiro is out. Risa is afraid that it will ruin their marriage, so she can't bring herself to say anything. Taking advantage of this, her perverted father-in-law's harassment escalates. The intentions of each of the three people become complicated and intertwined...