向こうの両親の教育が厳しくて門限は17時。友人の紹介でももの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。僕はももの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、もものの自宅に招待された。そして、そこで彼女の母親、百合香さんに出会ったんだ。百合香さんは大人の色気が漂う美人だった。しかし、その百合香さんからもものと別れろと言われた僕は、思わず百合香さんを押し倒してしまい…。それから、僕と百合香さんは密会を繰り返す事になった。もものが門限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 Momo after a friend introduced us, but our dates were always to fancy cafes and art museums. I wanted to take things further with Momo, but her father would always call, urging me to come home. Then one day, I was invited to Momo's house. And that's where I met her mother, Yurika. Yurika was a beautiful woman with a mature, alluring charm. However, when Yurika also told me to break up with Momo, I impulsively pushed her down… After that, Yurika and I started meeting secretly repeatedly. Right after Momo left for her 5 PM curfew…