Listen to Koeru / Uma Musume【超える / ウマ娘 シンデレラグレイ】 (PianoBox Music) online. Koeru / Uma Musume【超える / ウマ娘 シンデレラグレイ】 (PianoBox Music) is an Instrumental language song and is sung by Relaxu. Koeru / Uma Musume【超える / ウマ娘 シンデレラグレイ】 (PianoBox Music), from the album Anime PianoBox Collection, Vol. 53, was released in the year 2025. The duration of the song is 3:45. Download Instrumental songs online from JioSaavn.