During the summer when I went back to my parents' house with my wife, I met my neighbor Yui, who used to come over to visit us a lot. She has grown up to be a lovely girl, and she tried to seduce me when her family wasn't looking. Even though my beloved wife was nearby, I ended up having sex with her without realizing it. Her sexual desire only grew after that, and we ended up sweating and fucking like crazy over and over again.