TPIN-069 My Sister and I's Decade of Nipple Harassment: After a decade of developing my 13-year-younger sister's nipples to make her sensitive, she started to seek nipple orgasms on her own. Iori Hinano

Worried about my shy, reclusive sister's future, I've been developing her nipples for the past ten years. Ten years ago, I started making her undeveloped nipples erect and playing with them to teach her pleasure. Seven years ago, to promote the sexual growth of her developed nipples, we had repeated sexual experiences. Three years ago, even when she got her first boyfriend, I continued developing her nipples. Now, my sister's nipples are as sensitive as a clitoris, achieving the highest sensitivity, and I've successfully cultivated an instantly orgasmic constitution in her. My sister, who received nipple genius education, is now a master of nipple orgasms.