JUQ-169 secretly having an affair with the sister-in-law while the older brother is on a business trip.

After a few years of living together, he had gotten used to arguing with his wife, and it had been three weeks since she returned to her parents' house. While I was complaining alone, I received a phone call from Hibiki, my childhood friend. We talked about meeting up after a long time, so I invited Hibiki to my home. As I was lost in memories, I pushed Hibiki away out of frustration. Kissing is not good; but what if it’s something else? When asked, he neither denied nor confirmed with a flushed face. And if it’s just 3 cm, then it’s not cheating, and a distorted unfaithful relationship began.