Kanako Iioka is a brave wife who comforts her husband who loses his erection during sex and makes him ejaculate with her mouth and hands. However, Kanako is not satisfied with her husband's sex, so she has an affair with her brother-in-law, the president of the company where the couple works. While her husband is away on a business trip, her brother-in-law's extra thick cock turns Kanako into an obedient bitch. She is collared as a pet and trained as a sex slave who cannot resist. She is humiliated by being forced to masturbate with the electric toothbrush her husband uses, and then her frustrated pussy is penetrated by her brother-in-law's cock, becoming a slutty wife who enjoys incestuous sex.