Mitsudomoe is a Japanese comedy anime and manga about the mischievous Marui triplets, with Futaba as the youngest and most energetic sister, known for her boundless energy and love of running. This short clip isolates her hurried footsteps, a sound that fans recognise from her frequent dashes through school corridors and playground scenes. Shared on soundboards, it has become a handy shorthand for anime running gags, letting creators add a familiar, light-hearted sense of speed to edits, memes and reaction videos without needing dialogue.