The clip comes from Shy, a ballad by Finnish power metal band Sonata Arctica, fronted by singer Tony Kakko. The track built a following among metal and anime edit communities, where its gentle, romantic mood stood out from the band's faster songs. Online, the repeated hook was cut into a short standalone sound because the phrase is easy to recognise even out of context. Portuguese speaking fans in particular shared it as an earworm, and it now circulates in fan edits and reaction posts whenever a shy moment needs a musical caption.