My neighbor, Yuzuna-san, and I were barely more than acquaintances before that. But something happened that brought us closer, and she ended up visiting my place. I'm married, so there was some hesitation at first, but I was also looking forward to spending time with her... When she arrived, she was wearing a swimsuit. And not just any swimsuit—it was see-through! We found ourselves completely consumed by our secret relationship, unable to tell anyone about it. *Note: The contents may vary depending on the distribution method.