"We're father and son, so there's no need to be embarrassed about it now," Fuka says, hesitantly accepting her father-in-law's request to wash her back while they're alone. Fuka, who is usually quiet, is overwhelmed by her father-in-law's forceful request, and before she can resist, she is cornered in the corner of the bathroom. When her father-in-law's calloused fingers touch her ample breasts, which have never been fondled by anyone other than her husband, Fuka feels both lust and disgust at the same time...