What is humanity? To her, it was merely an obstacle. Rumiko (26) had disliked human beings since her high school days in the concert band, where she played the alto horn. Serious, competitive, and disciplined, she was recognized as an outstanding musician within the group. She believed herself to be exceptional, while others were merely average. Though popular, that popularity brought her no joy. Instead, she valued people only when they fulfilled her desires exactly when she needed them. Gradually, she became a target of bullying—and she enjoyed it. To her, relationships with people created an ideal space. Yet at the same time, she developed a strong curiosity toward sex. After beginning to masturbate, she started confronting her body daily, relentlessly pursuing pleasure. In this process, she grew increasingly fascinated by the male penis, driven to explore what lay beyond it. One day after school, a boy confessed his feelings. She accepted his confession and immediately had sex with him. The pleasure she experienced was something entirely new. Their relationship continued afterward, and he became the only person with whom she could reveal her true self. However, their breakup came suddenly. As someone who disliked people and struggled to express her emotions, maintaining the relationship had been painful for both of them. She realized she could never truly understand others, and her expectations toward human relationships eventually dropped to zero. From then on, she drowned herself solely in physical connections. For her, sex without love was still pleasure—and in fact, unnecessary emotions were simply a burden. Even today, she lives in solitude, earning money through loveless sex, endlessly chasing pleasure.