Song Form: Hallway-CaseA-NightCall-CaseB-Shiver-NightReturn-Credits
Harmonic Motion: i / bVI / iv / V7b9

[Hallway] Bars 1-8
Layers: Pad, Ambient, Texture, Keys
Focus: 先讓空間與霧感把畫面搭起來。

[Case A] Bars 9-28
Layers: Drums, Bass, Keys, Pad, Texture
Focus: verse 像走路跟拍。

[Night Call] Bars 29-40
Layers: Drums, Bass, Lead, Counter, Bell, FX
Focus: hook 不是喊，是冷冷地勾人。

[Case B] Bars 41-56
Layers: Drums, Bass, Keys, Counter, Texture
Focus: 第二段用對位線補敘事。

[Shiver] Bars 57-64
Layers: Ambient, Pad, Bell, FX
Focus: 短暫只剩空氣與寒意。

[Night Return] Bars 65-76
Layers: Drums, Bass, Lead, Counter, Bell, FX, VoxGhost
Focus: 最後把夜色再壓近一層。

[Credits] Bars 77-84
Layers: Ambient, Keys, Texture
Focus: 像片尾字幕。