遗失的心跳（R&B） is a neutral, low-energy track by 卷笔刀的卷 from 遗失的心跳（R&B）, released February 4, 2026. It runs 3:20 at 126 テンポ (252 テンポ double-time) in B♭ Minor (Camelot 3A).

Find the テンポ and music key for any song with our テンポ and キー Finder.