It's midsummer in the countryside. Akiba Momo, his brother's wife, has returned home and is in the midst of her heat. While her husband is out, she begins a forbidden secret rendezvous with her brother-in-law. On the old tatami mats, with the electric fan running, they engage in a sloppy sex scene. The sweat gushing from her entire body mixes with the nectar overflowing from her ripe body, filling the room with the strong scent of a woman. She desires her brother-in-law's youthful cock and graciously accepts the semen that is pouring into him. A memory of that summer day, immoral and passionate.