The sweltering heat of midsummer scorches the skin. After failing to land a job and growing distant from his family, stepbrother Ken finds himself trapped in emotional darkness. One day, witnessing the warm, loving bond between his younger brother and his wife, suppressed emotions erupt uncontrollably. His lust for his sister-in-law, Serina, steadily intensifies until he finally forces himself on her. Amidst mingling sweat and bodily fluids, Serina reveals an intensely erotic figure, her lustrous skin glistening in the light. When Ken resolves to leave the house, the reaction Serina shows him...