A private tutor from a student days when I met at a place where I moved, and an immoral afternoon.

"Hajime-kun? Horiuchi Hajime-kun is...!" I heard a strangely familiar voice from the house next door, when I went to say hello to the house for the move. The person was Ayaka-sensei, a private tutor when she was a student. I was happy to meet the person I admired for the first time in a long time after a long time, but it was a little painful for me to see Ayaka-sensei married. And that night, as I was feeling frustrated with the thoughts of Ayaka-sensei and heard the couple's affairs and Ayaka-sensei's moans from behind the thin walls...