たけしは親友の省吾の家で遊んでいると、見覚えのない美人を見かける。省吾のお姉さんにしては美人すぎると不思議に思っていた。次の日、たけしは、レポートの提出を忘れた省吾に家で待たされていると、例の美人のお姉さんに遭遇する。お姉さんに口説かれたたけしは、お姉さんの下半身に硬いものを感じ、驚愕する。
While playing at his best friend Shogo’s house, Takeshi sees a beautiful woman he doesn’t recognize. He thought it strange that she was too beautiful to be Shogo’s older sister. The next day, Takeshi is left waiting at home for Shogo, who forgot to submit his report, when he encounters the beautiful lady. Takeshi, who is being seduced by his girlfriend’s older sister, is shocked when he feels something hard in her older sister’s lower body.
– JavGG.net