Little is documented about the original recording behind Kurosaki Yufei 666, and the title appears to come from a user generated soundboard upload rather than an official release. The 666 part reflects long running Chinese internet slang for smooth or awesome, which explains how the clip is tagged and shared online. At just over three seconds it fits the short form edit culture of meme pages and gaming highlights, where a brief labelled hit is easier to reuse, search for and drop into new videos than a longer track.