妻が2人目を妊娠ー。ボクの唯一の楽しみは長男の保育園でるいさ先生と交わす会話だった。「お仕事がんばってください！」母性あふれるさわやかな笑顔に毎朝元気をもらっていたそんなある日…妻と長男が里帰り出産のため帰省してしまう。それから1週間、部屋も散らかり性欲も溜まりに溜まったボクの目に映ったのは自宅にいるるいさ先生だった。日常が非日常に。その日からボクはるいさ先生と自宅でSEXしまくった。何度も、何度もー。

My wife was pregnant with our second *****. My only joy was the conversations I had with Ms. Ruisa at my eldest son's daycare. "Please do your best at work!" Her refreshing, motherly smile always cheered me up every morning. Then one day… my wife and eldest son went back to her parents' home for the birth. For the next week, my house was a mess and my sexual desires were at their peak, and all I could see was Ms. Ruisa at home. The ordinary became the extraordinary. From that day on, I had sex with Ms. Ruisa at home over and over again.