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「もうセックスしたの？」紗季は遊びに来た娘の彼氏・誠を問い質す。お付き合いの指導をするつもりだったが、まだ二人の間に関係がないことが発覚する。
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1
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表向きは厳格な教師を演じながらその実、麻友子の本性は教え子とこっそり関係を持って快楽を貪るスケベ女だった。最近は教え子の山田と学校内の死角で事に及びスリルと背徳感を楽しんでいた。だが、その様子をクラスの河谷に目撃されてしまったことで状況は一変する。
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