Infinity is known among fans as a song connected to Umamusume Cinderella Gray, the story centred on Oguri Cap, a grey Thoroughbred-inspired horse girl whose rise from local races to national fame drives much of the series. Short clips of its ending passage circulate on soundboards and in fan edits because the melody is instantly recognisable to viewers who followed her journey. Rather than being a loud meme sound, it survives as an emotional shorthand for perseverance, letting creators signal a long road, a comeback or a farewell in just a few seconds.