向こうの両親の教育が厳しくて門限は17時。友人の紹介でましろと付き合う事になったけど、デートといえば、おしゃれなカフェに、美術館。僕はましろともっと先に進みたかった。でもいつもお父さんから帰宅の催促の電話がかかってくる。そんなある日、ましろの自宅に招待された。そして、そこで彼女の母親、桃子さんに出会ったんだ。桃子さんは大人の色気が漂う美人だった。しかし、その桃子さんからましろと別れろと言われた僕は、思わず桃子さんを押し倒してしまい…。それから、僕と桃子さんは密会を繰り返す事になった。ましろが門限17時になり帰っていった直後に…。

Her parents were strict, and her curfew was 5 PM. I started dating Mashiro after a friend introduced us, but our dates were always to fancy cafes and art museums. I wanted to take things further with Mashiro, but her father would always call, urging me to come home. Then one day, I was invited to Mashiro's house. And there I met her mother, Momoko. Momoko was a beautiful woman with a mature, alluring charm. However, when Momoko told me to break up with Mashiro, I impulsively pushed her down… After that, Momoko and I started meeting secretly. Right after Mashiro's 5 PM curfew arrived and she went home…