幻の蝶

Japanese female-vocal nightcore rock, fast sop-tempo around 175 BPM, driving live drums with bright double-time hi-hats, distorted rhythm guitars, melodic lead guitar, tight electric bass, dramatic minor-key verses opening into huge anthemic choruses, urgent clear female vocals with emotional high-register lifts, layered harmonies in choruses, short instrumental guitar interludes, rising bridge, polished modern mix with crisp top end and controlled low end, sustained momentum for a song longer than four minutes; vary every section and avoid repeating the same phrase verbatim