{
  "prompt": "Genre: J-Pop / Trance / Anisong; BPM: 143; Key: Cm / Eb Major; Rhythm: Driving beat with a constant kick, sharp snare on 2/4, and a fast, pumping 16th-note synth bass line.; Instruments: Punchy electronic drums, layered trance-gate synth bass, distorted rhythm guitar, and bright supersaw synth leads, pads, and fast arpeggios.; Vocals: Female, high-pitched, clear, and powerful lead vocal with a pure tone and energetic delivery. Polished with light, transparent pitch correction.; Mood: The final moments of a power-up sequence, energy crackling in the air as city lights blur into streaks below.; Production: Dense, high-fidelity mix with a wide stereo image. Bright vocals upfront, heavy sidechain for a pumping feel.; Language: Chinese; Highlight: The split-second of silence after the massive synth riser and drum fill, right before the first chorus erupts.",
  "lyrics": "[intro]\n(Chords: Cm - Gm - Ab - Eb - Bb/D - Cm - G - Cm)\n(Inst: High-energy opening with fast synth arpeggios, a catchy supersaw lead melody, and full driving drum beat. Establishes the core trance feel immediately.)\n(Mix: Wide stereo field, synths panned hard, rhythm section centered and powerful.)\n\n[verse]\n(Chords: Cm - Ab - Eb - Bb - Cm - Ab - Eb - G)\n(Vocal-Perf: Controlled and rhythmic delivery, lower in register than the chorus, mezzo-piano dynamic.)\n(Inst: Energy drops slightly. Kick and pumping synth bass drive the section. Main synths switch to background pads and subtle plucks.)\n(Transition: A subtle synth riser begins to build at the end of the section.)\n歩いてきた この道を\n振り返ることしか\n出来ないなら\n今ここで全てを壊せる\n暗闇に堕ちる街並み\n人はどこまで立ち向かえるの?\n加速するその痛みから\n誰かをきっと守れるよ\n\n[pre-chorus]\n(Chords: Ab - Eb - Bb - Gm - Ab - Eb - F - Gsus4 - G)\n(Vocal-Perf: Melody ascends, building tension and intensity towards mezzo-forte.)\n(Inst: Pads swell, snare drum builds into a rapid fill. Energy ramps up significantly.)\n(Sound-Design: Prominent synth riser and filter sweep creating a powerful lift.)\nLooking!\nThe blitz loop this planet to search way\n\n[chorus]\n(Chords: Cm - Gm - Ab - Eb - Bb/D - Cm - G - Cm)\n(Vocal-Perf: Full power, soaring high notes, sustained and confident delivery at forte.)\n(Inst: Explosive energy. Full layers of supersaw synths, distorted rhythm guitar power chords enter, driving beat at maximum intensity.)\n(Mix: Extremely dense and wide. Vocals sit on top but are surrounded by walls of synths.)\nOnly my RAILGUN can shoot it 今すぐ\n身体中を 光の速さで\n駆け巡った 確かな予感\n掴め!望むものなら残さず\n輝ける自分らしさで\n信じてるよ あの日の誓いを\nこの瞳に光る涙\nそれさえも強さになるから\n\n[verse]\n(Chords: Cm - Ab - Eb - Bb - Cm - Ab - Eb - G)\n(Vocal-Perf: Returns to a more controlled, rhythmic delivery. Clear enunciation.)\n(Inst: Similar arrangement to the first verse, but with an added counter-melody from a pluck synth.)\n(Transition: A quick drum fill leads into the pre-chorus build.)\n立ち止まると 少しだけ 感じる切なさに\n戸惑う事 無いなんて嘘はつかないよ\n宇宙に舞うコインが描く\n放物線が決める運命\n打ち出した答えが今日も\n私の胸を駆け巡る\n\n[chorus]\n(Chords: Cm - Gm - Ab - Eb - Bb/D - Cm - G - Cm)\n(Vocal-Perf: Full power again, with added subtle background harmonies to increase impact.)\n(Inst: Maximum energy, all elements firing. Distorted guitar is slightly more prominent in the mix.)\n(Mix: Saturated and powerful, maintaining the epic scale.)\nOnly my RAILGUN can shoot it必ず\n貫いてく 途惑うことなく\n傷ついても 走り続ける\n狙え!凛と煌く視線は\n狂い無く闇を切り裂く\n迷いなんて 吹き飛ばせばいい\nこの心が叫ぶ限り\n誰ひとり邪魔などさせない\n\n[interlude]\n(Chords: Cm - Gm - Ab - Eb - Bb - Cm - G - Cm)\n(Inst: Instrumental section featuring a highly melodic and technical distorted electric guitar solo. The solo uses fast runs, string bends, and a wah effect. The underlying rhythm section remains high-energy with driving drums and pumping bass.)\n(Mix: Guitar is the clear focus, front and center with dedicated reverb and delay.)\n\n[outro]\n(Chords: Ab - Eb - Bb - Cm - Gsus4 - G - Cm)\n(Inst: Music gradually deconstructs. The main synth lead plays the hook one last time as drums fade out, ending on a sustained synth pad chord with a long reverb tail.)\n(Vocal-Perf: A final, distant vocal ad-lib might echo out.)\n(Structure: Long fade out.)",
  "song_id": "03_only my railgun_20260420",
  "_meta": {
    "provider": "google",
    "model": "gemini-2.5-pro",
    "usage": {
      "prompt_tokens": 11880,
      "completion_tokens": 1268,
      "total_tokens": 16530
    },
    "generated_at": "2026-04-20T22:52:34.237357+08:00"
  }
}