While his wife is traveling alone, he goes on a forbidden secret date with his sister-in-law Yuka. Even though their relationship has cooled off, he still can't resist her sweet and affectionate seduction ...... "You're cheating on me too, aren't you?" She smiled like a goddess, but seduced him with her devilish whispers! Her slim waist and shapely figure revealed incredibly voluptuous flesh! Her seductive figure was so different from his wife's that he had completely forgotten about her. Though it's not a good thing, he's far more attracted to her than he was to his wife, lingering day and night, night after night...