Asuka lives with her husband's parents to take over the family business. During her second summer after getting married, her brother-in-law returns home with debts. Perhaps the extreme heat is distracting, but when Asuka and her brother-in-law are alone, they instinctively make love. Hot bodies, intertwined gazes, and splashes of sweat. Although they resist at first, the two of them open the forbidden door and the next day...