On the very day summer vacation began, I decided to stay over at my older brother's place. He's my childhood friend, and I'm also close with his wife, Ai. Ai and I used to date in the past, so I was looking forward to seeing her again. She was just as she'd always been—pure, gentle, and still carrying that innocent charm. As I spent time with her, my heart began to stir uncontrollably. Even with my brother nearby, we started secretly getting intimate, seizing every tiny opportunity to confirm our feelings for each other. That thrill only intensified our connection, drawing us deeper and hotter than ever before.