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> The absolute ace of the tennis club, "Kitamura Kaori", has been worried about her junior "Ami" who has been absent a lot recently. One day, she is instructed by her advisor to go to Ami's house to check on her. She has heard from her childhood friend "Masaya" that Ami has been acting up lately, but she believes that if she, as the club president, persuades her, she will come back to the club. However, evil thoughts begin to arise in Ami. She wants to bring Kaori, who is active in the "upper world", down to the "lower world" just like her. She uses her sex friend to attack Kaori, and the downfall of the absolute ace begins!