I had made a promise with my friends—that I'd let them grope my older sister's breasts. When I told her about it, to my surprise, she replied, "...It's okay." Honestly, I'd expected her to flat-out refuse. I never thought she'd have such a loose sense of chastity. That response left me both shocked and unsettled. Soon after, my classmates arrived at my house. My sister was about to let them touch her breasts. My heart pounded—caught between excitement and anxiety, the moment drew nearer.