The temptation of a tanned brother's wife

His older brother and his wife went on a trip abroad, and Takashi had returned home from Tokyo to stay home. A week has passed and Takashi is surprised to see his brother and his wife return from overseas. Her brother's wife, Yuko, was a beautiful white-looking girl, and was tanned to the point of leaving marks from her swimsuit. Although she thought she shouldn't look, Yuko smiled as she followed Yuko's tan marks with her eyes, "Do you want to see the tan marks inside her clothes?" Takashi desperately tries to suppress his desires, and decides to return to Tokyo, but on a sudden business trip, his brother leaves and is left alone with his brother's wife...