The phrase dokidoki kyun is a familiar Japanese expression for a heart racing with excitement, often paired with cute, romantic scenes in anime and online videos. Short clips like this one circulate on soundboards and in fan edits, where the playful melody and upbeat rhythm make it an easy shorthand for a crush or a flustered reaction. Because it is short, bright, and instantly recognisable as a romantic-comedy cue, creators keep returning to it for TikTok edits, anime compilations, and reaction memes that need a quick emotional punch.