TPIN-069-Uncensored-Leaked — My 10 Years of Nipple Harassment with My Sister: After 10 years of developing my sister's nipples to make them more sensitive, she began to crave nipple orgasms herself. - Iori Hinano

Worried about the future of my shy and withdrawn younger sister, I've been developing her nipples for the past 10 years to encourage her to become more active. Ten years ago, I began to stimulate her undeveloped nipples, making them erect and teaching her about pleasure. Seven years ago, I encouraged her to have sexual experiences to further develop her growing nipples. Three years ago, even after she got her first boyfriend, I continued developing her nipples. And now, my sister's nipples have become as sensitive as her clitoris, achieving the highest level of sensitivity, and I've succeeded in training her to be an instant orgasmic. Having received this nipple-focused education, my sister is now a genius at nipple orgasms.