"I've always been self-conscious about my inverted nipples," she murmured, sounding a bit insecure. I'd never seen inverted nipples before, so honestly, I doubted whether they could really be such a complex. But the moment I actually saw real inverted nipples, I was utterly overwhelmed by the shock. In that instant, I felt as if, "I was born precisely to encounter inverted nipples," a moment I'll never forget. Why were they inverted? Why wouldn't they protrude? What color, what texture lay hidden beneath? My imagination was completely ignited. I became obsessed with this mysterious feature and strongly thought, "I absolutely must make them erect." Humans, as hunter-gatherers, aren't drawn to fleeing prey, but are instinctively aroused by prey that stands still. I realized that the urge to make inverted nipples erect was a natural human desire. It was then that I truly discovered this instinct for the first time. I had come intending to have sex today, but my goal had already changed. My new mission: "Make her feel intensely and make her inverted nipples erect." To cut to the result, I did manage to make her feel pleasure. But the crucial part—her inverted nipples actually becoming erect—never happened. I felt deeply frustrated. Why wasn't I capable of this? I seriously agonized over it. And then, I made a resolution: I would challenge inverted nipples across the nation and hone my skills. Just you wait, unknown inverted nipples out there! I will definitely liberate you from your sealed world!