星河歎之歡悅（伴奏） is a melancholic, low-energy track by 關大洲 from 《星漢燦爛 月生滄海》影視劇原聲音樂 (關大洲作品), released September 15, 2022. It runs 2:42 at 63 テンポ (126 テンポ double-time) in F♯ Minor (Camelot 11A).

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