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Akira, who lives alone, has been having relationships with his two aunts. Each aunt believes that she is dating Akira seriously, and has no idea that he is cheating on her. One hot summer day, Aunt Kana comes over and cooks dinner, and clings to her, perhaps because she is sexually frustrated. Then Aunt Mio comes over and is surprised to see each other. A fierce battle for Akira begins, with the aunts using each other's techniques to the fullest...