【I want to play with Korin's hard nipples!】 When I was a kid, my parents remarried and I got a stepsister. We got along well and had a relationship like real siblings, but as she grew up and her chest swelled, my brother started getting excited and began observing her. Then I saw her erect nipples and the urge to touch them exploded! Unable to hold back, I started teasing her and she screamed 'Big brother stop!' and began to struggle. But every time I stimulated her sensitive nipples, she would twitch, driving me wild with lust! The momentum couldn't be stopped, and it escalated from tweaking her nipples straight into SEX! The sister, overwhelmed by pleasure, accepts her brother's perverted sensual development training. "I'll make Fruilin into a premature ejaculator!"
