"Hajime-kun? It's Hajime Horiuchi, right...?" I heard a strangely familiar voice when I went next door to say hello after moving. It was Ayaka-sensei, my private tutor from my school days. I was happy to be reunited with the person I had been in love with, but my heart ached a little when I found out that she was married. Then, that night after the moving process was finished, I was thinking about Ayaka - sensei and feeling agitated when I heard a married couple having sex and Ayaka sensei's moans from the other side of the thin wall...