On a sweltering summer day, Yui, who lives in an apartment with her husband's parents, was suddenly visited by her unemployed brother-in-law. Although he is her husband's brother, Yui felt anxious about living with a stranger... Her premonition came true! One tropical night, her brother-in-law caught a glimpse of the alluring sweat emanating from Yui's body and, seizing the opportunity while the family was out, launched an attack on her…
