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A brother-in-law who was frustrated by work and returned to his parents' house in disappointment. It wasn't sympathy that greeted him, but the cold gaze of his family. On a sweltering tropical night, his brother-in-law, who looks into the activities of his younger brother and his wife, is driven by impatience and desire, and commits his younger brother's wife, Rin, in the absence of his family. Sweaty sexual intercourse that violently devours Rin who resists ... A man and a woman who are smeared with sweat, saliva and body fluids drown in sexual intercourse.