On a midsummer night, freelance writer Jotaro returns to his hometown. By chance, he witnesses his younger brother and his wife, Nozomi, secretly making love. Overcome by uncontrollable desire, he ends up taking her himself. From that night on, the two become consumed by feverish passion, repeatedly drawn to each other's bodies. Drenched in sweat and overwhelmed by desire, their intense affair deepens. A summer fling ignites a burning lust that consumes both their minds and bodies.