On a sweltering summer day, Yui's unemployed brother-in-law shows up at the apartment where she lives with her husband's parents. Even though he is her husband's brother, Yui feels uneasy living with a stranger... and her premonition turns out to be correct! One tropical night, her brother-in-law peeks at the voluptuous sweat gushing from Yui's body and waits for the family to leave before attacking her...
