Going to my wife's hometown, my sister-in-law takes care of me.

In the summer, when I returned to my parents' house with my wife, I met Yui Shirasaka, who had visited me a long time ago, for the first time in a long while. She had grown up cute, stealing the family's attention and charming me. Although my beloved wife was nearby, I realized that I had developed a relationship with her. After that, her sexual desire only increased, and we often sweated and went crazy together.