勤め先で経理をする地味社員の白石。部署でも孤立して気軽に手を出す存在としては都合の良い存在。ストレスが溜まる会社での息抜きのつもりだったのだが…。脱げば美肌で巨乳、久しぶりのSEXなのか感度も抜群！！まるで俺が良い男になったかのような錯覚を覚えるほど何度も潮を吹いて、絶頂を繰り返す彼女。‘このまま地味な人妻セフレで終わらせるには惜しい―’と俺好みに仕立てることを決心して…。

Shiraishi is a plain-looking employee who works in accounting at my company. She's isolated in her department, making her a convenient target for casual encounters. I intended it as a way to unwind from the stresses of work, but… When she undresses, she reveals beautiful skin and large breasts, and her sensitivity is incredible, perhaps because it's been a while since she's had sex! She climaxes repeatedly, squirting so much that I almost feel like a real man. 'It would be a shame to let her end up as just a plain married woman's casual sex partner,' I decide, and begin to mold her to my liking…