結婚を機に退職して早2年。出張が多い夫とのすれ違いの日々が続き、子供にも恵まれず夫婦間は冷めきっている。今日からまた夫は長期出張。その事を知ってか知らずか、現在でも続けているママさんバレーボールの監督が自宅に突然やって来た。最近練習に身が入ってないと感じていた監督は気分転換に練習を促す。以前、一度だけ関係を持った事がある2人は密着指導からセックス指導へ…。更にコーチも呼んで3Pセックスで絶頂！

It's been two years since I quit my job after getting married. My husband's frequent business trips have left us constantly apart, and we haven't been blessed with ********, so our relationship has grown cold. Today, my husband is off on another long business trip. Whether she knew this or not, the coach of the women's volleyball team I still play for suddenly shows up at my house. The coach, who felt I hadn't been putting much effort into practice lately, encourages me to practice to change things up. Having had a one-time encounter before, the two move from intimate instruction to sex instruction… and then they even call in the coach for a threesome, reaching climax!