【浮遊する作業用BGM】The ambient drones of Bill Baxter/その13 2020.11.09 作業用BGM 浮遊する作業用BGM Song of the Darkening Sky Song of the Darkening Sky by The ambient drones of Bill Baxter A Life on the Ocean Wave A Life on the Ocean Wave by The ambient drones of Bill Baxter The Big Country The Big Country by The ambient drones of Bill Baxter