Home Items [Affinity] My BGM is On [Affinity] My BGM is On Zenless Item Rarity: A[Affinity] My BGM is On[Affinity] My BGM is On Rarity AClassCOMMISSION ITEMDescriptionBilly hums the theme song to Starlight Knights while confidently declaring "Nobody can beat me while my BGM is on!" Clearly... he's in high spirits.