The younger brother had just been on a business trip for a few days when the bastard father had a fit of lust and wanted to rape his beautiful daughter-in-law Makina Yui. Having been spying on her since she first came home, the husband went away for work and on the day she was dressed too sexy, he saw the opportunity and without hesitation, he pressed her down and raped her. Although the younger sister-in-law knew it was incest, partly because she had long been deprived of her husband's affection, and partly because she was just as lustful as her father-in-law, she had no choice but to silently "endure". What followed were the two's very intense and attractive sex positions and sexual intercourse.