CAWD-091 Fights, monotony, boredom... After pressing the wrong button, I got drawn to my sister-in-law, Yukinari-san, and indulged in forbidden adulterous sex. Ito Yukinari

The affair partner is my sister-in-law, my wife's older sister. The marriage was a result of youthful impulsiveness. Driven by momentum, we got married, but fights increased, and our relationship became monotonous and dull. As we entered a phase of boredom, I even started feeling disgust. It didn't take long to fall into an adulterous relationship with my sister-in-law, Mayuki. This is an endless, sordid affair, but this urge won't stop. The passionate sex reminded me of the 'love for someone' emotion that I was about to lose in my married life... genuine deep penetration, over and over again.