Raburi Chansu comes from the Japanese song Koi no Hime Hime Pettanko, a character song that later received many vocal covers online, including the version by utaite singer Namirin credited in this clip. The raburi chansu phrase is part of its repetitive, high energy chorus, which made short excerpts easy to share separate from the full track. As anime covers circulated among fans, the hook became a standalone snippet for edits and reactions, valued less for its lyrics than for its instantly recognisable cute delivery and rhythm.