Riko is my childhood friend from the same class. One day while studying together for our exams, I touched a girl's breasts for the first time at Riko's urging. From that day on, I couldn't help but be preoccupied with Riko's breasts at school and after school. Whenever I had a moment, I would sneakily ask to touch them. The two of us discovered that especially the nipples felt good...
