As I was walking, a beautiful woman with black hair and big eyes called out to me. It was Karen, a classmate whom I met for the first time in 10 years. He half-forcibly invites Karen, who has changed from her once neat impression to a wonderful adult woman, to his home, and they start talking about their memories. I was disappointed to find out that Karen, who I once loved, was married, but I couldn't bear it because of the strangely close relationship between them...