硝子の微笑み

Style: Dark, melancholic Japanese J-pop with quiet anger and emotional tension. Soft, gentle feminine vocals with restrained emotion, a slightly fragile tone, and clear Japanese pronunciation. Slow tempo, delicate piano, subtle music box, soft ambient textures, and minimal percussion. Intimate, moody, bittersweet, and slightly unsettling, like a dark psychological anime ending theme. The anger should feel suppressed beneath a calm voice, gradually building emotional tension without becoming loud. Keep the melody subdued, the instrumentation sparse, and the overall volume gentle. No upbeat pop, no dance beat, no heavy drums, no powerful belting, no explosive chorus. End with a very soft, low-pitched rendition of "完璧な笑顔"., female vocal, Soulful vocals, sad, aggressive