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One hot summer day. My husband, who became a son-in-law, lived with his parents-in-law at his wife's parents' house. However, gradually the husband begins to agonize over the ripe body of his mother-in-law, Kyoko Shimada. Then, from the moment the bride and father-in-law went out and became alone with the mother-in-law, the husband and mother-in-law finally became one ...