Two years into her marriage, Nao is a beautiful young wife who any man would envy. One day, after finishing shopping, she arrives at her house and witnesses a shocking sight. She sees her husband masturbating through the open window. She crouches down on the spot in shock, when the caretaker passes by and calls out to her out of concern. The two, who were never meant to meet, end up in an affair so passionate that they end up sweating after witnessing him masturbating.