"Five years ago, Ayano-chan told me the same thing." For five years, I had been continuing a sex friend relationship with Yuu-kun, my son's friend. It started when my husband's affair was discovered, and we had a big argument five years ago. Yuu-kun embraced me gently, who was exhausted, and confessed to me. Although I also wanted to respond to Yuu-kun's feelings, I decided to wait until graduation day. And on graduation day, we crossed the first line. From then on, we continued days of seeking each other. For five years, I repeated clandestine meetings while stealing time from my husband and son.