愿 (《神印王座》动画插曲·永恒誓约曲) is a somber, mid-energy track by 阿卜 from 愿 (《神印王座》动画插曲·永恒誓约曲), released April 22, 2026. It runs 4:26 at 138 テンポ (276 テンポ double-time) in B♭ Major (Camelot 6B).

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