During the one month summer break from school, I decided to go visit my brother's house. My brother and I were good friends, and Ai, who married him, was also a childhood friend of ours. What's more, Ai had dated me in the past, so I was looking forward to our reunion. Ai was as beautiful and innocent as ever, and I couldn't contain my feelings. Ai felt the same way, and we began to get affectionate with each other, even though my brother was right next to us. If there was even a moment's opportunity, the thrill of quietly teasing each other in secret...it just made our relationship even hotter.