"Damn teacher... just the main event..." College girl Natsumi works at a high-income escort service to pay her tuition fees. One day she happens to run into her professor while delivering at a client's house. Determined not to get caught, they manage to finish their escort play without any issues. However, despite being marked as 'NG', the professor insists on having his way with her under a different name. He forces himself inside her, making her cum against her will. As he plows through her body like a horny old man surrounded by desperate perverts, she can't help but feel some pleasure amidst the degradation.

「ダメです先生…本番だけは…」学費のために高収入のデリヘルで働いているなつ。ある日デリバリーされた先で恩師と再会してしまう。何とかバレない様にデリヘルプレイを終えた。店側からNGにしたにもかかわらず、違う名前で指名してきた恩師に「お母さんにも知られたくないだろ。」と押し倒され無理やり挿入され絶頂させられてしまう。元教え子のカラダにむしゃぶりつく先生はそこら辺の性欲まみれのオヤジと変わらなかった。そんな人との最低なSEXに溺れながらも快感を覚えていく。